Datasets:
stemdataset
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STEM

Dataset card Data Studio Files
xet
 Community
1
subject
stringclasses
4 values
grade
stringclasses
15 values
skill
stringclasses
445 values
pic_choice
bool
2 classes
pic_prob
bool
2 classes
problem
stringlengths
0
1.12k
problem_pic
unknown
choices
listlengths
2
4
⌀
choices_pic
listlengths
2
4
⌀
answer_idx
int64
0
3
math
grade-3
select-fractions-equivalent-to-whole-numbers-using-models
false
true
Count the equal parts. What fraction does this picture show?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABkCAYAAAC8REciAAAnGElEQVR4nO3dfXBb5b0n8K/1eiTLkYic+CUvVkIrB/KCUkNIcptGlExv2NrFnUtDYJnizHZo2qEls3CX295O696909IdmKa3TLdQ9sbM7RRC2ble7A4ZIES56dppwEXECY3VJZHjxG9IQbL1cvTq/UPRsWVJtl7tGL6fGYZYOjrnSN8/nt8855zfUzE1NTUFIiIiIiIqCdlinwARERER0SeJYrFPYC4j7kEMu51wDNkxGfQk/h/w5PRZ8xoLqrQGmFcn/t9k3l3ekyX...
[ "9/9", "3/3", "3/9", "9/3" ]
null
3
math
grade-7
model-and-solve-equations-using-algebra-tiles
false
true
Which equation does this set of algebra tiles represent?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABiCAYAAABqHaQ/AAAJsElEQVR4nO3dX2hU2QHH8d+dmTTWMZtso2PUqFWRNnG31FgjWNRFKnTrQiljYQtiX6T4In2JL9ZFtKD45ktgF9y+la6ywRdtSyVQtVSqot0tJl380wxqHCepcaPJRsyd04e4AYk4Yz33zr3nfj+Pl+H8Lucm3N/MnDnXM8YYAQAAALAiVesTAAAAAFxCwQYAAAAsomADAAAAFlGwAQAAAIso2AAAAIBFFGwAAADAokytTwDx4pd6ZMb6rY/rZduUzuXJcywPAIAk8r7...
[ "x+8=15", "x+2=15", "x+2=20", "x+8=20" ]
null
0
math
grade-2
which-bar-graph-is-correct
true
false
Evan looked around in the attic and found seven telephones. He found fewer violins than telephones. He found more stools than telephones. Evan made a bar graph of the items he found. Which is his bar graph?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAa4AAAEOCAYAAADR6fN0AABXlklEQVR4nO3dd5xU9b3/8ddp02fLbN9lYekBBQVRBGzYYkUTY/DGxFxNDLaf5nevsSS50V9uTExMYozRGNEYWzSJJmossSN2pagooNRld2F7m37mlN8fsy4SQEFghlk+z8djH+zMnPL5DjDvOed8z/eruK7rtpqwOgFRGywXIYQQYq+hKxDWYGwAqjygtKZd963+fJclhBBCfLbpRaCvSmQf1HhgfDCbakIIIcTeImrDh3HYZMJHCVD7rewLElpCCCH2RmEtm1E...
1
math
grade-5
types-of-angles
false
true
Look at the angle marked on this shape: Is this angle greater than, equal to, or less than a right angle?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACgCAYAAAA2PRuAAAAHIklEQVR4nO3dwWvceRnH8SeTTGhZR3SrYLKgKWYpgQQXbJZSxEMtNNGDPSl7sAqyJ6HdhR7XP6EgxT8gxEvZQ9keaj3UUhQKSimlI7bgQoNgRWml7LgtJHTGw0K2LKE7mXlmvt/Y1+s0YYbwHN+ET34z0ev1egEAAKRolD4AAAD+nwhsAABIJLABACCRwAYAgEQCGwAAEglsAABIJLABACCRwAYAgEQCGwAAEglsAABIJLABACCRwAYAgEQCGwAAEglsAABIJLABACC...
[ "less than a right angle", "greater than a right angle", "equal to a right angle" ]
null
0
math
algebra-2
domain-and-range-of-radical-functions
false
true
What is the range of this function?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH8CAYAAADrBti4AABlK0lEQVR4nO39f3RU92Hn/79G80u/kZBAwgIJYww2GGFjgwMGG9eO7dqJE0izdvvND/e42zqbNNnsOd2TT7fNtjk+3pxt036SJtlstmmcdPv5ZuNPHLfGlgmOsSEQg5FBGPkHWAaBAP0eSfPz3jtz7+cPIRkZMBLcN8Og5+McH6zR3Jfeunfmzmuu3nNvwPM8TwAAAAB8UZTvAQAAAABXEgo2AAAA4CMKNgAAAOAjCjaACRoaGrRz587xrw8fPqxZs2aps7Mzj6MCAKB...
[ "$\\{y \\mid y \\leq 0\\}$", "$\\{y \\mid y \\geq 0\\}$", "$\\{y \\mid y<0\\}$", "$\\{y \\mid y>0\\}$" ]
null
1
math
grade-2
match-analog-clocks-and-times
false
true
What time does the clock show?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAEJCAYAAADhBFPCAABSkElEQVR4nO3de3RU9bk//veePbdcZnKBcEu4q5DxhvSURK3YbzVoxWMtwVbUcyq2VrvW4YBHwdVjoaug57SAR9CeVdEqvVjFSvyd1YLVRD2naZFEWwQqk6KEWyaGEEKSndtc9uX3xyRDhmRm9kxmMpe8X2uxyOx8Zs/HZEae/dnP53kETdM0EBERERFRRjAkewJERERERBQ/DPCJiIiIiDIIA3wiIiIiogzCAJ+IiIiIKIMwwCciIiIiyiDGZE+AUoCiAYoGbeDvwNe...
[ "3:35", "3:40" ]
null
0
math
grade-3
am-or-pm
false
true
Hayley's mom is building a tree house in the backyard. Hayley's mom's watch shows: What time is it?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEJCAYAAACuWVASAABZoElEQVR4nO3dd1iTV/sH8C/KhqBYF4IyrIPYKi5A61b0VVBbcWuto662Fq2rfav2dXQ4+lPU1r2to4p1W6GOWgdDfR01VKsMCaIvKhgQEhz8/qBEIgl5skiA7+e6epUk5znPXQoXd07ucx+r/Pz8fBARERERkVFUMncARERERETlCRNsIiIiIiIjYoJNRERERGRETLCJiIiIiIyICTYRERERkRFZmzsAMj+5XI7c3Fzk5uQgN1eO3Nwc5ObmorK1NRwdHODg4AAHR0c...
[ "9:25 P.M.", "9:25 A.M." ]
null
1
math
grade-1
compare-clocks
false
true
The clocks show when some friends went to the library Tuesday afternoon: Who went to the library last?
"iVBORw0KGgoAAAANSUhEUgAAAt8AAACZCAYAAAD3lFacAAAkLUlEQVR4nO3deXhU9f0v8PeZ7AtZIBtbQgQUkEV2RRQIGAptIVhEFqNsXmhr1SpcVChijQsKP9vqtbjQRiQIXhDCJVJAhEJAEcoiRpAtIbIkJGQhycxkm+/9I80kw8wkM2fOnFnyfj0Pz3PmrN8Z8j7zOWe+5xxJCCFAbqn+9T0QO39UbH0XtFpU1dcpsq6giGD02f+8Iusi8iTMJZH7YS7Jk2hc3QCy4votRXckStOVaVG25YSrm0GkLuaSyP0wl+RhWHy7KVFwy9V...
[ "Betty", "Chase", "Mary" ]
null
2
science
grade-3
identify-mammals-birds-fish-reptiles-and-amphibians
true
true
Birds have feathers, two wings, and a beak. A woodpecker is an example of a bird. Select the bird below.
"iVBORw0KGgoAAAANSUhEUgAAAvgAAADMCAYAAAAGVtdxAAEAAElEQVR4nOydd5xdVbm/n7XWLqfMnOmTyaRXWgghJLTQEQQvoiBFikpRsQuIAnq5ysUrKk0FUaoi5aJ4EUVRqtTQEkJIQkvvyWT6zGl777XW74995kAgQIBc8efdjx8+5pw5Z9d1znnXu77v9xXWWhtFEcYYEhISEhISEhISEhL+/0RKieM4iDAMbRLcJyQkJCQkJCQkJPz/j5QSmQT3CQkJCQkJCQkJCf8aGGOQH/RBJCQkJCQkJCQkJCRsO5IAPyEhISEhISEhIeF...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA6cAAADMCAYAAACPx9V0AAEAAElEQVR4nOydd5glVZ2/33NOhZs7T+hJzAw5i4AoiARBcJEFBF2UVQRzRjGvqy67ogJiRJGgKCj+2HVVDEtcERmQjOQ0TA49nbtvqqpzzu+PuvdO953bYWAUV+t9nnnm3grnnKo6dbs+9U3CWmujKMIYQ0JCQkJCQkJCQkLC/02klDiOw72jsFsW8urFHlFCQmvGNDxZhI0BdDhwWHu8XCbCNCEhISEhISEhIeH/PsYYoihKhGnCXz15Fb9AARjXW5fLRJgmJCQ...
0
math
algebra-2
find-inverse-functions-and-relations
false
true
The graph below shows a function. Is its inverse also a function?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH8CAYAAADrBti4AABr+0lEQVR4nO3de3Qc1Z0v+m8/pdbLrYctyTKSsI1FZCSBwSZ+yDbHBBgcnNhJjklOQpghySEnwJzMnZmVyU2yJhlfTs6aIXNCIMlkwgTIZE0mnAABG2FMMLYig42FLVmyMUbYeljWo6XuVj+q69FV9w+5hOVnt1Vb3S19P2tlBbW6vt6q6t716927dtkMwzBARERERESWsKe6AUREREREMwkLbCIiIiIiC7HAJiIiIiKyEAtsIiIiIiILscAmokn+4z/+Ay0tLRM/a5q...
[ "no", "yes" ]
null
0
math
grade-1
cubes-and-rectangular-prisms
true
false
Which shape is a rectangular prism?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAACuCAYAAACvDDbuAAAMsElEQVR4nO2dXXBcZRnH/2eTTdM0TWrApAVKirQJ0jEUCxTUKRUdi6MUvQAvVIYZv/BOnFHHC7gQr1Bn8Eq50BFmvAC8adSZwihfTotAYZoisOkHttOE7pbWJtl0m2azOV482d2zZ/fs7jl7vp7t/zeT2fPxvu95z8l/332f93nO+xqmaZrpReBYDsgWgCUThMSOTgNY2wFs6QGGugAjfck035iLulqENM+OPqDzaE52NnQBo2tE1YTEjWwBmLwAnF4EjuSAxNy...
0
science
grade-3
identify-mammals-birds-fish-reptiles-and-amphibians
true
true
Birds have feathers, two wings, and a beak. A red-tailed hawk is an example of a bird. Select the bird below.
"iVBORw0KGgoAAAANSUhEUgAAAvgAAADMCAYAAAAGVtdxAAEAAElEQVR4nOydebwcVZm/n7NUdffdb5KblSwkIWwhLLJJZAmIAgIKAsoyouAyLiAgAsqoIL9RRxAcwQ1QQZYRmUEEl2FVhERkFcMOCdnIfvfbt7urzvL741R3EggQICOMUw+ffLi3l6rqU1V93/Oe7/t9hffeG2NwzpGTk5OTk5OTk5OT878TKSVaa0Sapj4P7nNycnJycnJycnL+9yOlRObBfU5OTk5OTk5OTs4/Bs455Ft9EDk5OTk5OTk5OTk5m488wM/JycnJycn...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA6cAAADMCAYAAACPx9V0AAEAAElEQVR4nOydd7wkRbn+v1XVPXNy2BzYZdkIm2CBBWRhYUmy5KgSFIErVwwELwperpF7TSQVRImCBAUUEQQlKmnJcYEFls05nZxmuqvq90d1Tzpzzh5gjb9+Ph8+e6anu6q6OjBPPe/7vMJaa8MwxBhDggQJEiRIkCBBggQJ/jUhpcTzPF5qgynVUKv+0SNKkKA82jW82wnrstDowT4NbrtMiGmCBAkSJEiQIEGCBP/6MMYQhmFCTBP806NWuQUUgA6d3y4TYpo...
1
math
grade-1
comparing-review
true
false
Which group has more?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAHwAAABeCAYAAADhenCDAAAER0lEQVR4nO2dP1MTQRiHf5e7ZAAloOOEkcIww6hNCgtn7OQTCB0VYwWdUGHnN7ADO6CyswM7OyytLNJELIgFQnQk4a8kd1mL42ZiyMUR3r0l+75Pk8kks+/+7rm928Bu4iil1G4d+HoCHAaAryBYhOcAgy5wfwAYyQDO7plSnw5Md0tIgidZwNs6CZ/czQAPb4Rng2APhwFQOga+14EvJ0DqwA9fENl2MuiGbgHgKABSQcsLgp1EbhsKSJntipA0IpwZIpwZIpw...
1
science
grade-7
identify-how-particle-motion-affects-temperature-and-pressure
false
true
The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature?
"iVBORw0KGgoAAAANSUhEUgAAAmwAAAGZCAYAAAA0Im0SAACQ90lEQVR4nO3dd1xb9f4/8FcSRggJUGZZ3SS1u4UurZa2t161pHrVWqFex1cF53WA97pq6VevE9TvdRXqT2tVcF1HoVVrtdRqZ2jpbuguFLqYoYSR8Pn9QXOaQ0IJkHnyfj5EyMnJOZ+Tkjfv85kixhiDF6upOY/jx0+gtbUFIpHI1cUhBADg6+uLyMgoDBo0yNVFIQJG8Y+4I4p/1vm4ugCu1NHRgerqajDWAT8/P1cXhxCemprziI6Ohq+vr6uLQgSI4h9xZxT/LIl...
[ "sample B", "sample A", "neither; the samples have the same temperature" ]
null
0
math
precalculus
determine-one-sided-continuity-using-graphs
false
true
Is f(x) continuous from the right at x=2?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH/CAYAAABtkqoWAAB120lEQVR4nO3de3xU9Z0//teZayaTy+SekJAAIihIUBAUBMVi1Wq1BdfF9tvbPmy7um3tZe3l22+//e12Xb/teunWVbf1u/1W7Xa3W7ZeKhgoCgINFSRCIAEBuSQZcptJ5n45998fIZFAkATOh8kkr+fj4QMzk/Oed86ZOfOaz3zOOZJpmiaIiIiIiMgStkw3QEREREQ0kTBgExERERFZiAGbiIiIiMhCDNhENMzmzZsxbdo03HnnnQCAu+66Cy+//PKIv6uqKq6//nq...
[ "no", "yes" ]
null
1
math
grade-2
symmetry
true
false
Which picture has symmetry?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAOAAAADgCAYAAAAaLWrhAAAoEklEQVR4nO2deXhTZdrG75wsJ2uT0iVdWNtCq2gXKKAsOoyCIAPiggqjfCI6gojjqLiyjoobo1ZlmRmRRQXUURFEGRgFlAKytQXUhjbQgrRJF5o2aZqkSc73R+xmszfJSdL3d11eNjnvec8Tmrvv9iwchmEYjQUoNwJ6G2BlQCAQggSPA8i4wGAxoBQAHI2ZYY42sW0WgdD7GBUD8MqMjhfJAiBT4lAngUAIDnoboGoGqi3AWSNANVkdF4j4CITgI+M6tAYABht...
0
math
grade-4
compare-decimals-using-models
false
true
Compare 0.26 and 0.5. Use the models to help. 0.26 ?0.5
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAC0CAYAAACuelsNAAALm0lEQVR4nO3dW4hVBRvH4XdkKjUnBrLpgJGT2gnUQSjSmETEjCQUOzjlEiwvKiqFzCQ1UUQyQ0rCiyJDa5Kd0EWiZkSYQYF40cgEmtCByJRJyMopj8x3kc7XqF810+t2Pn0e6GJ2679cG9bFz+1yW9HW1tYWAABAih5n+wIAAOBcIrABACCRwAYAgEQCGwAAEglsAABIJLABACCRwAYAgEQCGwAAEglsAABIVPlvxkXRlHQZnCsaG+vOyq/rXuRkZ+teBACfYAMAQKJ...
[ "=", ">", "<" ]
null
2
math
algebra-1
perimeter-and-area-changes-in-scale
false
true
Look at this parallelogram: If both dimensions are doubled, then which of the following statements about its perimeter will be true?
"iVBORw0KGgoAAAANSUhEUgAAAB4AAAAOCAYAAAA45qw5AAABtUlEQVR4nOXUoavyYBQG8LPrBZUpjE2WnME0sbswDGqwCSbBNrNNFINgsJgMJv0rhAliUlgzDKOmIQzrRIZF3Z7b9t3Lp9zvhovhe9p5X877C+fwMgBAL8jbK9AAXiwWpKoqRaNRSqfTNB6Pf18GAFmWMRgM4LouDMMAy7JYrVb4zRAATCaTL4f5fB6j0ehp0+FwQKVSAcdxkCQJnU4HACAIAlqtFjKZDDiOQ6PRwGw2Qy6XQywWQ6lUguM4f+DPuVwu4Hkey+XyIXq...
[ "The ratio of the new perimeter to the old perimeter will be 2:1.", "The ratio of the new perimeter to the old perimeter will be 4:1.", "The ratio of the new perimeter to the old perimeter will be 3:1.", "The ratio of the new perimeter to the old perimeter will be 1:2." ]
null
0
math
grade-1
compare-money-amounts
true
false
Which is more?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAlYAAACYCAYAAAAm2KfyAACBIklEQVR4nOy9d5xcd3nv/z5lep/Z2d77qvcuWZZVbOMOtgEbmxLKz6EnIcklwCWQQkLuJfUGQnCjGrAtucm2JFuSrd53Ja1W23ud3mfOOb8/ZnfAQBLbyBjQeb9eflnSFp3vo505n/OUzyNomqaNZ6A7AVEFcho6Ojo6Ojo6OjqvA1kAhwRNVigxgjCe1rRjkbf7snR0dHR0dHR0frdZ7QT5ciL/mzIjtNjyqktHR0dHR0dHR+d/JqrApTiMZaArAWIkl/+ALqp...
1
math
kindergarten
identify-pictures-with-symmetry
true
false
Which picture has symmetry?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAOAAAADgCAYAAAAaLWrhAAANaklEQVR4nO3dfXAUh3nH8d/e6XSSTi8G6w0QBpsXDwY8ndACxh13DC1uQ5zGE0/TNEMayHTqtOk0aRsmbtzMNH3Bbv/wkHH8koTY8Yyx3dQJY4zT2AEnNsbgtB4cCRPbvBmQ9YrQ6d50p7vd/nFIIEsCcTrdc0Lfzwwj3cvuPZL9Zfd2uTvH8zyvPSUdjUuRjJT2BGCSlDhSlV9aVCE1lEpOe9Lz3uyzHguYflZVSyXvx7MXZpVKN4aydQKYHJGM9G5MaktJ78U...
1
math
kindergarten
fewer-and-more-compare-by-matching
true
false
Which group has fewer?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAASYAAACGCAYAAABwryeAAAAYo0lEQVR4nO3d6XMc953f8XefMwMM5gCIY3AfPMBLIkVKvGSJ1uV4N7Yk20+STVypbCq7lVRSm8o+SVX+hFSSh9mU46rUZu3a2qwdr9aWVhcl6yBF8RBJUSAJEDcwg4O45j66f3nQuChSEiWDQJP+vqokEJhBY+bzAz7d08dvNKWUSpVgIAdpByoKIYTYVKYGNQbsqIJGG7RUUamzS1v9sIQQwnMkAmZ/zvskYcOuaq+1hBBiM6UduJ6FZAlu5EBfqng3SCkJIbZ...
1
science
grade-5
identify-mammals-birds-fish-reptiles-and-amphibians
true
false
Select the bird.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK8AAADMCAYAAAAF8vOBAAEAAElEQVR4nOz9V7BlWXrYd/63t8e7623e9K6qsly76u7qJgqEdwRJ0AwJjsgBSCo0MhwyRtIMRY5ipOFoQiMxJhgcSgRIgTAkgEYDDTTad1d1uazMykp/vT/3eLO9nYekQi9gBMR60URwPe1YcSLOw/7tb3/nrG+tT3hvnOcXLChI/Lvx78b/Jsc0hScunEZQkeFT5Wfz4r+D++/G/9ZHQYIL1rNrJ/1f5sV/B/ffjf9/GP+z0zj/X+bkP+qDf+s//2HCKGCmqWM...
2
math
grade-4
nets-of-three-dimensional-figures
true
true
Which net will make this figure?
"iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAYAAABw4pVUAAAQLElEQVR4nO2de1TVZbrHP/sCbNgoilzkJpe4CcpWsdCBNWqmVlONNGWndFIPph47Kzdh6lSTu7E1qR0Bc42ZiJLZZKvlCtepDmmOUKJZgwKhbcQLCoobuWzkftu/8wfjHjGBfRM2sD9r+Yfs3/u+D/vL+/ze53ne9/cTCYIgYMNqEA+0ATa6YxPEyrAJYmXYBLEybIJYGTZBrAybIFaGTRAL8Mknn/DII4+QlZVlfmeCDZMpKioS4uLiBEAABF9fX7P7tAliAjU1NcK...
null
[ "iVBORw0KGgoAAAANSUhEUgAAASIAAADlCAYAAAD3JPoOAAAhrklEQVR4nO3de1jUdf738ecwwIiIoDKQxllBEdPUFnPtWq006b7X0r22rK1fWpLluqZYYeVlWnZQr008lKXiIde90917NyzvFsNWbTWNzURSAUnEAUUOKjgcHGCY+48JFEUFZobv8J334x8uceY770/Si+/h83l/NIAF4TQsFgvna+HnajCaoV7+dYQKuWvARwuRXSHQEzRIEDmV8yYL6ZeVrkKIjjOiO7grXYRoLrfa+rW3J/T3tv7WEEJtjGbIqYKiWjhZDW5...
0
math
grade-2
match-analog-and-digital-clocks
true
true
Look at the analog clock: Which digital clock shows the same time?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEJCAYAAACuWVASAABZPklEQVR4nO3dd1hU19YG8BcLHZTEDgpiLDMmdgFNRI2CN4KaiA1bosaSYtDYki+xgSm2q6i5ir3FjrFhIsQSbIDGWK5D1EjRQeK1AIPADCh8fxhGkClnOuX9PU+eMJx9zlkhzMOafdZe26qoqKgIRERERERkFNUsHQARERERUWXCBJuIiIiIyIiYYBMRERERGRETbCIiIiIiI2KCTURERERkRDUsHQBZnlwuR15eHvJyc5GXJ0deXi7y8vJQvUYN2NvZwc7ODnb29rC...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA5AAAAEJCAYAAADiusiGAABkdklEQVR4nO3deViUVfsH8C8u7Gu5g4KYKVjgCqiJmYJvilrirlhqLpWm5Va/UlPsLUVfRe11wV3TXLBcC8gyV0AzwdchNVl0cAkVGARmWOT3BzGBDMwz+8L3c11dMvOc5zw344w995xz7mNRVlZWBiIiIiIi0goLCwtDh0CkM/UMHQARERERERGZBiaQREREREREJAgTSCIiIiIiIhKECSQREREREREJwgSSiIiIiIiIBGlg6ADI8KRSKQoLC1FYUIDCQikKCwt...
2
math
kindergarten
fewer-and-more-compare-in-a-mixed-group
false
true
Are there more rectangles or triangles?
"iVBORw0KGgoAAAANSUhEUgAAAUQAAAA2CAYAAAC/d+C4AAAEX0lEQVR4nO3by05TURTG8UVLQwuVIurYKU58Ap/BF3DmMzgzjoyv4duoUwIDbiPKTEMImlAuMccBLVLopuey195rkf9vBG3Sfb5kZbEDHwtFURQCAJBW7gcAACtYiAAwxkIEgLHF3A8ANLH1ZUdOd/6onzN49URef3ylfs7EY81lHTdEuJZiaaQ8J/V5qXNZl+yG+PXzLxERef/pRaojkyCXDRsv9W45u4c7ap89z2PNVVbqOUxyQxzuXcrPoyv5eXQlw73LFEcmQS5...
[ " triangles", " rectangles" ]
null
0
math
grade-3
compare-area-and-perimeter-of-two-figures
true
false
Which figure has a greater area?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAKsAAACgCAYAAABzL5zaAAAGnklEQVR4nO3az0tU+x/H8dcxHeSmBTUYgmaC99uiHxgGQoKaTtgspkUluSiIQAhyoRGBRCFE4SJoVaHoKmYTSFR/QATZ4sIQE4TYXOiHi6/izNDM3CvqaOe7mG+R2K2bOR7f9XyAjGfOZ8b34NMPh3Ec13XdyXnpzxkpsygtuALWhUJHKt0g/f6btM0nOZNzrvtH2uuxgK+r3yQVxmZyB+U+aefGXMnAepBZlMb/lv47L72akQrSC7kThIr1pnRDrktJ+mtRKlj...
0
math
grade-2
match-analog-and-digital-clocks
true
true
Look at the analog clock: Which digital clock shows the same time?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEJCAYAAACuWVASAABYF0lEQVR4nO3deVib15k28FssrwBLgCVskLwgvEBiQ0yCJ6ndBYhbO5nGMU7SzCTpjHGXzHQ60+C2k7bTTI27zLTTTI3TaedrO21IF3ezaxw7be0msUha06YmFpFjW9gxwosAG2GBZBaB0PcHkQpGy9Eu4P5dF1dAOu95nyTi4tHRc54jc7vdbhARERERUVSkJDoAIiIiIqLZhAk2EREREVEUMcEmIiIiIooiJthERERERFHEBJuIiIiIKIrSEh0AJZ5rfARj48OTvoY...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA5oAAAEJCAYAAAD1mFhPAABg20lEQVR4nO3de1jU55k//vdw+HBwhkEGhRlFBg+QKEQSsm21ByBpNdnGiIkxG9tdSdNmt9vdim03bb/NN2LafrfdphXSbve36W6Dbdc2jUaMpok2qUPTyjaVOGTwACY6eJgBZXBgRg4Dw/z+IExB5vDMeYD367q4hJn783zu6Ew7N8/z3I/M5XK5QEREREREYSGTyWKdAlHMJcQ6ASIiIiIiIppdWGgSERERERFRWLHQJCIiIiIiorBioUlERERERERhxUKTiIi...
0
math
grade-7
transversals-of-parallel-lines-name-angle-pairs
false
true
\line{TV} and \line{WY} are parallel lines. Which angles are corresponding angles?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAD2CAYAAADs6vBqAAAgx0lEQVR4nO3df1iV9f3H8dcBUTQmlCAqYCDNWqmA2K5h2gFKtrQmurraFqZ0qZe2XYvWbyvn1b7pmql0NdN+iqlXszKxJAsVQU23BAV1bf5AQKmAph6LKQbI948mizwodG7Ofc65n4/r8rrivg/nfn/eV3+8fPs5n2NraWlpkQU5HA5JUkhIiKl1eCv6BwAA4Jyf2QWYJScnRzk5OWaX4bXoHwAAgHM2q06wo6OjZbPZVFFRYXYpXon+AQAAOGfJCXZubq6qqqpUWVm...
[ "\\angle{TUX} and \\angle{VUS}", "\\angle{TUX} and \\angle{VUX}", "\\angle{TUX} and \\angle{YXU}", "\\angle{TUX} and \\angle{WXZ}" ]
null
3
math
grade-4
compare-fractions-using-models
false
true
Which fraction is greater?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAC5CAYAAAAS5EjTAAA0AUlEQVR4nO3df3RU9Z038HeYxA2/nJnVIkTtZEgoVsFMUOpjmzAz0uesUpAEUWh1N0MTKrvdloxbbOLTlcS1DVS2GbptBTvApNUjP/ZpEqDqaSW5IdNWi5CJQA+2CZnZRwj67GNuFAzFofP8Mb2XSQgwP+6PmeT9OqdHyMzc7zfJ55x++N7P/XyyIpFIBEREREREpIgJem+AiIiIiGgsYYJNRERERKQgJthERERERApigk1EREREpCAm2KNYuXIlsrKykJWVhVAopPd...
[ "4/12", "1/6", "neither; they are equal" ]
null
0
science
grade-3
natural-resources
true
false
Natural resources are useful things that come directly from nature. Which of these pictures shows a natural resource?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAV4AAAElCAYAAACszooYAAEAAElEQVR4nOz9Z5ckaZKliT3yMlUzcxIRGcmLdFX3EPTODBYHB9/wD/Cj9xycPTiLpdhZYGemu7e7uqqrkgVxYkRVXyL4IGrmHh40I1lEpklVpLsbVVNTvSrvlStX5H+4VP03Kzj1HOMYxzjGMb7HuK7wXzbwxQT3A/zf79nt7gi6xzjGMY7xw8Sph3+zst/X9eZ2dwTdYxzjGMf44WKPsVlvbgsveuBf/vG/B/RFdx1CRF5xJ/Cq+1/3/DeIb/P8/WPf5jnfNlS...
1
math
pre-k
represent-numbers-up-to-10
true
false
Which group has 7 rectangles?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAARwAAAEcCAYAAAAV9AvgAAAE40lEQVR4nO3cMW5UVxSA4TP2gCwbqFCiLCDJEtgALfugyIJYB7SUqbIDQvoQQYXxCIitl2KElBJFT/+Yyfc1b56edHVu8+tUs1mWZXnzeeaP3czlzcz1MgCr2G5m7p/O/Hg+8/3dmc2bT8vy2/tDjwUcu0cPZravd/uXH+7O/HyxrxHAGi5vZl5dzfz5eeb33czJ++v9B7EB1nb/dN+WmZkPNzMnN//6ALC2L235e5k5OewowP+J4AAZwQEyggNkBAfICA6QERw...
0
math
algebra-1
perimeter-and-area-changes-in-scale
false
true
Look at this parallelogram: If the height is doubled and the base is tripled, then which of the following statements about its area will be true?
"iVBORw0KGgoAAAANSUhEUgAAABgAAAAOCAYAAAA1+Nx+AAABEElEQVR4nN2UoYrDUBBFzytbiGhFILoQGxtoZFPIF8RX1UVFJP8QaFxcTX+ghRLIN7SqvramsuJRSCLeW7GwS1iRimbFHhgxYu4ZMyO01poBGQ0Z/kvQNA3L5RLf998vUEqxWq14Pp9vC+8I4jhmNpsRRVHvkGVZJEmC4ziYpsl6veZ4POJ5HtPplCAIeDweP4Isy5BSstlsXt7sfr9TVRWXy4WyLMmyjKIouN1u1HXNdrsF4GO/33M6nTgcDgghXhakaYpt2wC4rks...
[ "The new area will be the same as the old area.", "The new area will be 6 times the old area.", "The new area will be 8 times the old area.", "The new area will be 5 times the old area." ]
null
1
math
kindergarten
one-more-and-one-less-with-pictures-up-to-10
true
true
Count the dots in this group. Which group has one less than the group you counted?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABGCAYAAAD2IOMfAAAK50lEQVR4nO3dy49bZx3G8cf2eGY8F0/s6SXTKrACFl00oa0ECyqkLkoLamFTiRWIRYPIpn9FJRaIyw5BuwEJWnXTS6pIiIIEFYKqkBZlAYIFpCnNXDxje3yZ2D6HRVqRNI/JTHLe18cz388mu/Oe8513Jj/PHB8X0jRNBQAAACATxUmfAAAAAHCYMGADAAAAGWLABgAAADLEgA0AAABkiAEbAAAAyBADNgAAAJAhBmwAAAAgQwzYAAAAQIYYsAEAAIAMzUz6BPZj9+2...
null
[ "iVBORw0KGgoAAAANSUhEUgAABSAAAABeCAYAAAAzBboHAAASZUlEQVR4nO3dzW9ld33H8e/1w4w9HnvGnoTJBKWsgAULJgUErdSoEgtKKA/dILWbtlQiqOmC/hNISK0K7YqHsGklCmXRJARFrUorlagFSgspkcpDF20yyTx6Zuzx09j33i6cKcnMxyEJPueea79eG+/uOed9fvb8zneur3tVNSwAAGBfDIfDOn+z6qfrVav9qh27bQDgkJnqVc1PVr35WNXpI1W9MoAEAIB9c35rWN9ZGfVZAAB0w7sXqqZGfRIAAHCQ/GR99+u...
1
math
grade-7
classify-quadrilaterals
false
true
What name best describes this shape?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADCCAYAAABzAbXRAAAb5klEQVR4nO3df3zP9f7/8ft77/2wMY0yP8qPKVHTCHP8Nr+pSyhlfFjjRElOlpyjEk2KOMWocyLOicbFOP0Ql8rPUH7/6OtgPqRsqGTCG22z2Xv7/vH+bL3NsB/v9/v1/nG7Xi7ncsJ6vx/9d/e4PB7Ph6mgoKBAAAAAABzCz+gCAAAAAG9CwAYAAAAciIANAAAAOBABGwAAAHAgAjYAAADgQARsAAAAwIEI2AAAAIADEbABAAAAB/I3uoDS2Hb6gDLzrujwuXQlNB9...
[ "rectangle", "square", "trapezoid", "parallelogram" ]
null
2
math
grade-3
identify-rhombuses
false
true
Is this quadrilateral a rhombus?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABzCAYAAACil3UBAAAhz0lEQVR4nO3deXzUhZ3/8ddMTnJO7pscgJH7JiBHBBTwoF5ru3UXS7XQLtpa7f7a/f3W/W13Xde1WhVp665d6t2yIoJWEbnCZbgkCRBuSMh9TO47k8zM/hGdigTMwEwmhPfzDx/f73cm3+9noj7yzjff7/trsNvtdkRERERExCWMnh5ARERERGQwUcAWEREREXEhBWwRERERERdSwBYRERERcSEFbBERERERF1LAFhERERFxIQVsEREREREX8mjA3l2Rx8h3HmD++h/...
[ "no", "yes" ]
null
0
science
grade-4
identify-minerals-using-properties
true
false
Select the one substance that is not a mineral.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAANcAAAEGCAYAAAD2aACLAACbs0lEQVR4nOz9d5hs51XmDf92rJyrc/fJQUdHOTkHkC05yQxgm3ds88qAifZgY8wA3zCYwcyAMRhejMN8Hy8YGGPABidGYIvBOMmWJVvx5Ng5d1cOO35/7Hqe3lWn+6iPpGOlWrrqUp8Ku/be9dzPWuteSbmv7PsHE5DS6Etf+vI4pOrCiTrMW5DT4cXZ4Hm1D6y+9OWJSUqDg4ng75q78bzaB1Zf+vLEReDI9jeeU5+aU+lLX5790gdXX/pymaQPrr705TJJH1x...
0
math
kindergarten
triangles
true
false
Which shape is a triangle?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJAAAACVCAYAAAC3i3MLAAACV0lEQVR4nO3Uu2pUURSA4TWTTAqvneIDqK2d7+OD+UBWtl56Y5towJjhWBwEG9HwI+PA91Vns8+GVfyszbIsy/n1zMermcv9zM0y8Funm5n7JzNP78w8PpvZnH9bljcXhx6LY/Tywczph6v18ORs5vndtS74ncv9zLuvM5+uZ95fzWwvbtYL8fA37p+srczMfNnPbPe/XMDf+NnK92Vme9hROHYCIhEQiYBIBEQiIBIBkQiIREAkAiIREImASAREIiASAZEIiER...
2
math
algebra-2
linear-functions-over-unit-intervals
false
true
How does f(x) change over the interval from x= – 10 to x= – 9?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH/CAYAAABtkqoWAAB2HElEQVR4nO3deVxU970+8GeYHQYYNgExoMQlxYDGhCQqJCaxSW5NG0HzS9p0sc1Na40xSZvem5v2dk29vW2SNlZtmrY3S2/v7U3i1pig1bghJC4YUXBHZRFZBmZghlnOLOf3BxkKigp6vhwGnvfrlVfLyHnmwznMmWcOZ85oZFmWQUREREREiohSewAiIiIiopGEBZuIiIiISEEs2ERERERECmLBJqI+tm3bhvHjx2PevHkAgM9//vNYt25dv9/r9/tx++234+OPPx7...
[ "f(x) decreases by 2", "f(x) decreases by a factor of 2", "f(x) decreases by 1", "f(x) increases by 1" ]
null
2
math
grade-1
even-or-odd
false
true
Is the number of ovals even or odd?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAClCAYAAABm8IozAAAK8ElEQVR4nO3dMWic9/3H8U/+dDEYdO7ixIvO1miwLqSLTcHnwV0jT1lScp4K7aAbQldJa8FYHjvpoJ3Swc+tSaESNZ5S/MTEo8LjJdiL/RRS0k3/QZVIYlOu1k+60/n1gkNwnH7Po+/05tFzz++dvb29vQAAAEX837RPAAAA5onABgCAggQ2AAAUJLABAKAggQ0AAAUJbAAAKEhgAwBAQQIbAAAKEtgAAFCQwAYAgIIENgAAFCSwAQCgIIENAAAFCWwAAChIYAMAQEE...
[ "odd", "even" ]
null
0
math
grade-8
identify-trapezoids
false
true
Is this polygon a trapezoid?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABuCAYAAAAd32REAAAP+UlEQVR4nO3df3DU9Z3H8dcum2STbLLBcOVHEVQQQQpoPEVvEJG5XrE0UXSQE0f0gAPnqBSklPM82plydz0GoiPoCFavDiJX8CgjoFKt6Dh0KuJBAaEKAQk/gvQI2WyW7CbZ7Pf+COT7jRbIj+9+v5vd5+OvzA47+/ljd3jtZ9+fz8tjGIYhAAAAALbwur0AAAAAIJ0QsAEAAAAbEbABAAAAGxGwAQAAABsRsJOhslL64gu3VwEAAAAXELCT4ec/l26+WSotJWgDAAB...
[ "no", "yes" ]
null
1
math
grade-7
which-is-the-better-coupon
true
false
Which coupon should Irma use to save the most money on a baseball bat originally priced at $10?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAASYAAAC8CAYAAADVTgNLAAAizElEQVR4nO3deXhbxb3w8e/RLnmLlzj7ip0FSAJhScKekBAIhL20BVqg76UtfdPCpaUtlK5vC/fecrnwlkKBtrQFCmVNgSRAAwkkhGyELIQk2FkggWx2HMeLrPXcP8a2JEuOJR3JOlZ+n+fxY+nozGgsSz/NzJlF03Vd3+eH2lZoCkFQRwghepVNgyIrVHtggAO0fT5dX30k18USQghlSjHYalrVnUEOGFugopYQQvSmphBsa4G9fvikFSxHguoBCUpCiFwpsqo...
1
science
grade-5
compare-magnitudes-of-magnetic-forces
false
true
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes and shapes.
"iVBORw0KGgoAAAANSUhEUgAAAfQAAACtCAYAAABGII0BAAAvLklEQVR4nO3deXQUVb4H8G91p/fupLMvBAiQYEhAwi6LsghCEBURxFFGWcZBRzLjuA0iOgg4gMMbwHk+BEc2QRRGCLs6OoAsyhIIARKWEAIx6exJJ72mt/dHIAbI0t2p7uqu/D7ncA5Jqm/9us6t+tW9detexuFwOEAIIYQQvybgOgBCCCGEtB0ldD+WmZkJhmHu+CcWi5GYmIi5c+dCp9O5VN7kyZMxevRot2I5f/48EhMToVar3fo8IYSQtgngOgDSdosWLcKwYcM...
[ "The magnitude of the magnetic force is smaller in Pair 2.", "The magnitude of the magnetic force is smaller in Pair 1.", "The magnitude of the magnetic force is the same in both pairs." ]
null
0
math
grade-6
mean-median-mode-and-range-find-the-missing-number
false
true
Albert has the following data: If the median is 8, which number could k be?
"iVBORw0KGgoAAAANSUhEUgAAAK8AAAAkCAYAAAD/5WpuAAAHPklEQVR4nO2ca2ybVxnHf6/j2HEudm7O/eLUcdwmS7pkzRp1sFWMAarWEUY3oJO4CAmGxgeY2IdpEh/GRUIgpA0hITRAYhJ0qN2gVCNQrWtVyppsyXIh94sdJ2niOHFqJ058f/mQS3HTSG3zvk0tnd+39zn2eR77/fuc5znnvJZkWZYBiIIcBOLAukUguH+QAA1IaYB2wyTLsiwHgdAeBiYQ3An6dRFr5ChCuILkIgRyFDRCuIKkJAQaYnsdhUBwF8RAI4ozQVIig2a...
[ "7", "10" ]
null
0
math
grade-2
identify-the-fraction
false
true
What fraction of the shape is pink?
"iVBORw0KGgoAAAANSUhEUgAAAQQAAABkCAYAAABgi07kAAALdklEQVR4nO3db0wb9xkH8K/JJdi0JjIgN8NLYPM12G1YS7ZQLdDwpqHvIC/H3m15u73Yi7bbq67StHXJq6nVNKlKp0nT2CpVKnkJ06qmJdOgC7Qh4UzsDjcxbSxsl5BwTnC5vbjeYRvb+Hz+f9/Pm0T+c/dTFL665+G539kURVFARASgpdYLIKL6wUAgIh0DgYh0DAQi0jEQiEjHQCAiHQOhSF/OfVnrJRBVnI1zCIXJ6zIW/rCAzcgmXMddGPzlYK2XRFQxQq0XUK9...
[ "2/6", "5/6", "2/5", "2/4" ]
null
0
math
grade-1
subtraction-sentences-up-to-10-which-model-matches
true
false
Which picture shows 8 − 2 = 6?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAagAAABKCAYAAADuScD9AAATfklEQVR4nO3deXCU933H8fezt7SHjtUtEEiWUEEyp4MtbIOvCTHYiYOZkpZkSmInM8l0UnsmnvE0qSdp3aRpxnXcmbht6kxJHVKHmNrYwYmxaxviQCwHYUDikISELnTuSlrtvfvs0z8W7UroNBJolXxfMxrY3ef5Pc9Hq5nPPs/+9llF0zStJwzNfhhRIaohhBBC3HAGBex6qEiHfBMoPSFNq/Us9G4JIYQQSbc6wNDkj98oNEGlNd5eQgghxI02osIFH3SHodE...
2
math
grade-2
which-bar-graph-is-correct
true
false
Ian looked in the kitchen cupboards and found eight pans, ten knives, and nine bowls. He made a bar graph of the items he found. Which is his bar graph?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAZMAAAEOCAYAAABM5Pr8AABOa0lEQVR4nO3deXxcdb3/8ddZ52SWJE2TtmlK9xVoKQLdoCCUHWQREVxARbiCYFEUgXu9P7xcUbzeq4JyUdSrIuLKvYqIoixlb0vL1gJdoPuapmmSSWbO9j3n98eZhlaBImlmmuTzfDzySGYyM+dzBjrvfL/f8/1+tTiO420+vFaAvIIwRgghhHhbpgY5AyakYagN2jYvjhd3VLosIYQQfdXMajBXF5IbjTZMyiRJI4QQQrydvIKVXbDVh1UF0DvC5BcSJEIIId6...
0
math
grade-4
identify-rhombuses
false
true
Is this quadrilateral a rhombus?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAB6CAYAAACFmCTJAAAPU0lEQVR4nO3dW2yUZ37H8d87Hhtjj8FgPAY7tmGDtwkNwRASNgfq4IZDUqJEUbdrWVuJROlW5aCCxE0lLpC5IBcU0ZtKVZcQld1VHGC3VVNCOCxJyIZNUmIWZwKbmOCxDT5hMOCzh5lehH0wFLBn/M48Yeb7ufo/o5n3/d3xY/zM+ziRSCQiAAAAAK7w2A4AAAAAJBMKNgAAAOAiCjYAAADgIq/tALh/nT59WrW1tWpsbJTX69Xs2bNVXV2tkpIS29EAAACscfiRI2J...
[ "yes", "no" ]
null
1
math
grade-2
write-subtraction-sentences-to-describe-pictures-up-to-18
false
true
Which subtraction sentence does the picture show?
"iVBORw0KGgoAAAANSUhEUgAAAfQAAABkCAYAAABwx8J9AAAcdklEQVR4nO2da3Bc133Yf3ff7wUWD+JBkAREiqREiSIlPkBbkis1oeSR4qiUlU6lxvIoM41bf6mdNhN/cCfT1jON6yaTaTIZxUkoSyqbynSmih2Pq5fFRKJCiRQVUSJBgAQJkCBeC2B3sc+7995+WO4uFguQi32Ai+X/94W8Z+89+/+RZ85/7znnnqsYhmEgCIIgCMKaxnSrAxAEQRAEoXIkoQuCIAhCAyAJXRAEQRAaAEnogiAIQlU5PzR8q0MoopyY1pqHZRXjEAR...
[ "14 − 6 = 8", "14 − 7 = 7", "15 − 7 = 8", "15 − 8 = 7" ]
null
2
math
algebra-1
perimeter-and-area-changes-in-scale
false
true
Look at this circle: If the radius is tripled, then which of the following statements about its circumference will be true?
"iVBORw0KGgoAAAANSUhEUgAAACcAAAAUCAYAAAAOTSQ2AAACG0lEQVR4nO2VT0jTYRzGP/sLXYwixZWWkWEgwdKKlRkzl0XpdPprRUbCprEYKNTFVYuiixczy05l0d9DMRrkKWkY5XBgE9vJGHWKHE5vSYv9tg7S4tdyNZW5gw+8l/d5+L6f97l8ZfFgIE6WSr7cAKm0ArdQZTWccrkB/tT3SIRVpTs5b21Zuubcgx5kxdslR1snLGrmksE1HDxAPBggHgzgcz0FoKJsx6JmygHKjGYK9hlosLWzR2iWBPJ1+qRGatvsKYc6b/ShVqv...
[ "The new circumference will be 4 times the old circumference.", "The new circumference will be 2 times the old circumference.", "The new circumference will be 3 times the old circumference.", "The new circumference will be\n1\n2\nof the old circumference." ]
null
2
math
grade-6
identify-complementary-supplementary-vertical-adjacent-and-congruent-angles
false
true
Which angle is vertical to \angle{4}?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEFCAYAAADZm5BpAAAgZ0lEQVR4nO3da2yb5d3H8V/qglsOdsrwWhiVA+3GsCBNGbQeq2jKDkm1TS3apmSbtoYtUcQOqptoykEka9NHOUjkgNimasmkVEVrwkGk2oFk0rR0g2JYoWkBD0aBeOu2MjPquAVqwM3zIrNHaNqmqe3Lvv39SBOtc9v+R33z3aXrvq+8ycnJSSEnjI+Pq6CgwPQYAAAAljbP9ABIj/Hxca1bt870GAAAAJZHYOeI/v5+jY+Pa2xszPQoAAAAlpbHFhHrC4fDcrlcev/...
[ "\\angle{1}", "\\angle{2}", "\\angle{5}", "\\angle{3}" ]
null
0
math
grade-5
understanding-probability
false
true
If you select a marble without looking, which color are you more likely to pick?
"iVBORw0KGgoAAAANSUhEUgAAAPoAAACnCAYAAAA4/EEUAABEyklEQVR4nO29eZQc1Zn2+YvIzMrKzNpVpS2FSwgJJCgWIfgsDBRGbpDMMkiiG5BtGrwcCzx9jhsYD6vGfebTAuNuL2MPlu22/QGNwR/wCdF0C2iDAVkWApUBI7SAJJBqU6Hal1wj7p0/bkRkZKmk2jKztnzOEVGRGRkRGeRz3/e+y3M1KaUkjzzymNTQx/oG8sgjj+zDO9Y3kEcefW1J2o/GiHQa9HUkiXQYJCImgVIfwTIPwXIfoQov06oD+Is8Y327ExJa3nWfGHj...
[ "black", "neither; black and purple are equally likely", "purple" ]
null
0
math
grade-7
identify-trends-with-scatter-plots
false
true
Does this scatter plot show a positive trend, a negative trend, or no trend?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAFhCAYAAABK/t0lAAAqbUlEQVR4nO3df3CV5Z338U8CJCQ5+YkkJyQ5ixtSIMIQSCCRMHRRJwEhbiv2qdgdp3SkYGcWofvo0p2RYQV3si2urlUW7Cy2FpHdTZnpykOhigLCECAH2UFPcKUSI8GTg83vkB+ccJ4/GI7kx0kI3jn3nXPer78893Wa7/fGtvncF9d9XRE+n88nAAAAAIaINLsBAAAAIJQQsAEAAAADEbABAAAAAxGwAQAAAAMRsAEAAAADEbABAAAAAxGwAQAAAANZKmB3dnaqs7P...
[ "positive trend", "no trend", "negative trend" ]
null
1
math
grade-5
scalene-isosceles-and-equilateral-triangles
false
true
Is this triangle equilateral?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADOCAYAAAAEw3WqAAAoyUlEQVR4nO3df1zV9d3/8efhAIefIv4A8Qcm/uCXmOVchhAKqBTboq7czJXzqtRZklvLryu15b7X2q7y266Vu3aVWzW71tya2dYwEUIQpRQrNEkxR6nDPIqdpKN45MD5/oGeST+VX5/z43H/z950Pk9u+cez9+11Xh+Ty+VyCQAAAEC3CDA6AAAAAOBLKNjodrfccouGDh2qEydOGB0FAACg11Gw0a3y8/O1fv16NTQ06JVXXjE6DgAAQK+jYKNbnD17VtOmTdPGjRv...
[ "yes", "no" ]
null
0
math
pre-k
select-solid-shapes
true
false
Which shape is a cone?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAACuCAYAAACvDDbuAAATUElEQVR4nO2da4xc1X3Af+fcmZ192t5dbLNgx3GN7fII2zjYYFMecVuSkqBCA2pktQ5VSqqK9gOVoqopqaqWNqmUCIgUKapRK9IqQoLwiOXGpZFJQqmNbaAmPGQMcfx+7cPrfXke95x+uDOzM7uzuzNn7tzH7Pl92dl7z+N/d/9z7vk/zjlCa63PZuDDCRh1IaexWCJHQkCXA2vbYXkLiLNprfdfClssi6V6bl4EiSMT3i99LbC+w9NqiyVqjLpweBzOZOCDCZC...
1
math
grade-4
compare-fractions-using-models
false
true
Which fraction is greater?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAC5CAYAAAAS5EjTAAAsYElEQVR4nO3df3SU9Z0v8HcIPTch1Bl2qwROdQaCYl3NDD3r7UajmRwFtDRmgqspPUgmVVojdpnwQwMXL8nR00CFJrhbsd0sTCyikV0yEfQKiEwkRkrdzYT0rKJJMwO9kFyVPGlDJsXI3D/G52ES8mMm8/yazPt1jkfIJPN8ST7n8Ob7fJ7vJykYDAZBRERERESymKL1AoiIiIiIJhMGbCIiIiIiGTFgExERERHJiAGbiIiIiEhGDNhfu3jxIp566inceuutmD59Oiw...
[ "3/10", "1/2", "neither; they are equal" ]
null
1
technology
grade
photo
false
true
What type of video game console do you see here?
"iVBORw0KGgoAAAANSUhEUgAAAV4AAADLCAYAAAAm9/teAAC2IklEQVR4nOz9eZxk2VXfi37PEPOYEZHzXHNXVXdL3S2pJdCABLIlbAYZSQhJ5mLzfO/98LCxMX729bPN9b0Yrp8fGBsDupJAMwhJIAQCNKCx1a2e55qzsrIq54x5jjjT/WOffeJEVGQNPam7Fevz6a7MyBNn2Gfv317Db62lOI7jMJKRjGQkI3nBRP1e38BIRjKSkXy/yQh4RzKSkYzkBZYR8I5kJCMZyQssI+AdyUhGMpIXWEbAO5KRjGQkL7CMgHckIxnJSF5gGQH...
[ "WonderSwan", "Magnavox Odyssey 2", "Microsoft Xbox 360", "Sony PlayStation 4" ]
null
2
math
grade-7
identify-equivalent-linear-expressions-using-algebra-tiles
false
true
These tiles represent the expression 6x+8+x. Which expression is equivalent to 6x+8+x?
"iVBORw0KGgoAAAANSUhEUgAAAU4AAABoCAYAAACe0Rn2AAAHZ0lEQVR4nO3dT0wc1wHH8d/MLsVlIZAS1nagdm0rSoGkKqRgKQcrsmopSU8Rlxws92JVkRLUSsWXyL1wsMvNFw6R3NyqxlaQT26lUi6uVCRc4SYVdiuMxSo2bBciJMxiEMxMD1SoyHiXtzv7b973c/Mc3u8J3v40s2/wc4IgCAQAODC30hMAgFpDcQKAIYoTAAxRnABgiOIEAEMUJwAYojgBwBDFCQCG4pWeAFBpXmZMQfZB6OM6iU7FkgPW5dnAyfWXQ9NL41pcfxR...
[ "7x+8", "14x", "6x+9", "14x+1" ]
null
0
math
grade-1
match-analog-and-digital-clocks
true
true
Look at the analog clock: Which digital clock shows the same time?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEJCAYAAACuWVASAABYMklEQVR4nO3de1yb53k38J84iIMlDhI2SD4gfEC2A4GENK3dNkCS2ukaYpyk2Zu0e43XNlvbdw1e96bdus243d61694Zd2v3tl0bpWvdtbNrHNw2pkksksW0iYlF8En4JHwQByMskMxBIPT+QaRy0OHWWcDv+/nwCei5n/u5kogPl+7neq5b4nK5XCAiIiIioohIincARERERESLCRNsIiIiIqIIYoJNRERERBRBTLCJiIiIiCKICTYRERERUQSlxDsAij/n1Dgmp8Z...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA5oAAAEJCAYAAAD1mFhPAABiTklEQVR4nO3deVjb150v/rdYviyWEEbYgLwgvCAvEJOQpaZtgCx2Mg0xTlz7F7dzjdsmM23v1HjSm3ZuZ2I7nbnTTjtj6LS9d9pOQzptpkntGMduEztJLZLGtImJRcALOLaFsSXACAskswiEfn8QKBgtR7uA9+t5eIL0Ped8P7alPPronPM5MqfT6QQREREREQWFTCaLdAhEERcT6QCIiIiIiIhodmGiSUREREREREHFRJOIiIiIiIiCiokmERERERERBRUTTSI...
0
engineer
grade-8
identify-control-and-experimental-groups
false
true
In this experiment, which were part of a control group? The passage below describes an experiment. Abdul was a chef's assistant in an Italian restaurant. One of his coworkers told him that adding salt to water would cause the spaghetti to cook faster. Abdul gathered six pots that were the same size. He filled each pot ...
"iVBORw0KGgoAAAANSUhEUgAAAUwAAAELCAYAAACyM7+LAAEAAElEQVR4nOz9aaxt23Xfif1mt7rdneae273mvuaS7/GxE3tRpESKVE9RQlkqyxW7EMRVlYLhQoIg+RKgUAgqQBAHiCuAU0GhUqlCEhdcDiofLNmWZUm2JVESJbEXyUfy8bW3v6fdZzermV0+zLX2Ofe+90jKlv0UwPNi4Zyz795rr73XnGOOMf7/8R/ib/7Nvxn5t+Pfjn87/u34/6Pxt//2335L3lcD/OHv/Yvv+SQhxOt+P/+YlPJ7vj7GM5v8+tdLMpGD6PByhVK...
[ "the pots with salted water", "the pots with pure water" ]
null
1
science
grade-4
identify-magnets-that-attract-or-repel
false
true
Two magnets are placed as shown. Will these magnets attract or repel each other?
"iVBORw0KGgoAAAANSUhEUgAAAh8AAADoCAYAAABPVYZZAAArdUlEQVR4nO3deXiU1d0+8Hv2JfvKHjYRCIQdAVlVUEEooGK1ru9r3W2rVattffvqr9pqra218IqlahFcqKIgKiCyBwgQ9i0kIWEJCWTPJDOZfX5/xNCEJGQyeWbOM/Pcn+viwmqY50uvyck953zPOSqfz+cDhYVzdReRW30OuVXnUGwtR63LBpvbDqvLDqurHja3A+OPPQi9xwyXygGnygGHyo56Xz0m9kqH2aCDXq+CTq+CTqeGwahCQqIWSckNv7Ralei/IhERKYB...
[ "repel", "attract" ]
null
1
science
grade-3
animal-adaptations-skins-and-body-coverings
true
true
Musk oxen live in the Canadian Arctic and Greenland. The musk ox's skin is adapted to help the animal survive in cold places. Which animal's skin is also adapted for survival in cold places?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAEKCAYAAABnkCFsAAEAAElEQVR4nOz9d4BcVf34/z+n9z47OzPba7ItZdN7gRBCIAQIXUFBURGlWFA+NsSCYnkLggKCdClSAwESQnrPpu5utvc2Zaf3+vsjX/IhEjBggPfH3zz+2r1z7rl3zr137mvOfZ0zgmw2m02lUmQyGXJycnJycnJycnJy/t8kFAoRi8UIkslkNhfc5+Tk5OTk5OTk5Py/TygUIswF9zk5OTk5OTk5OTn/HTKZDMLPeydycnJycnJycnJycs6cXICfk5OTk5OTk5OT818...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA88AAAEKCAYAAAAsMWftAAEAAElEQVR4nOz9d8AkR33g/7+rquOkZ56cNueonHNASEIgkjDJJPmOMxhsYRPMnc9fy3AYnwg2QTbRgBEmmCDAEpIASSCUdxVWm/Pus7tPDpM6VtXvj8daIyNABtn4/JvXX8/01FTXVHfN05+u0MJaa/M8xxhDW1tbW1tbW1tbW9v/m6SUOI6DEOI3XZS2tv+SZDtwbmtra2tra2tra/t/nzGGPM9/08Voa/svS7YD57a2tra2tra2trb/GtrX9m1t/37kb7oAbW1...
1
math
grade-6
interpret-graphs-of-proportional-relationships
false
true
The Bountiful Harvest Festival awarded Hassan and his dad first prize for their garlic fries last year, so they're making them again this year. The key to their success is using fresh potatoes. The graph shows the proportional relationship between the number of potatoes Hassan peels, x, and the amount of time (in minut...
"iVBORw0KGgoAAAANSUhEUgAAAioAAAI0CAYAAAAz7AJYAABZt0lEQVR4nO3deXgUdb72/7uzh7AECEsAQZKwiAKuICqKxxnHDSQsAoo6Zxzn4G/WM86MiuybnmfGcXTUZ46PCy4oEgGRA+hwXADRQUC2BJQAhi0kEAjZk0531e+PTjqJSSAJna6q5P26Li5NdXX6k286VZ++61tVLtM0TQEAANhQiNUFAAAA1IdGBQAA2BaNCgAAsK0W36jceOON+uCDD/xff/jhh7rkkktkGIZ1RQEAgAZp8Y3KkCFDlJaW5v960aJFmjt3rkJCWvy...
[ "To prepare for the first day of the festival, Hassan peels 15 potatoes in 12 minutes.", "To prepare for the first day of the festival, Hassan peels 12 potatoes in 15 minutes." ]
null
0
math
kindergarten
name-the-two-dimensional-shape
false
true
What shape is this?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADtCAYAAACF+wIyAAAUZElEQVR4nO3dzU6bd//n8e898z+UWc0ZjDSnMAcyR1KaqN6UVZIVke5QiiWrEgWJNF1AEyksWgHhMTZEIditiJGFjYyN7VlMdavP4cH2z9fl12uXNrE/ajdvE/he/xoMBoMAAACG4r+lHgAAAHkisAEAYIgENgAADJHABgCAIRLYAAAwRAIbAACGSGADAMAQCWwAABgigQ0AAEMksPlL62fbsX62nXoGAEDm/FfqAUye3qAfD3cXIiLif/3v/xn//V8+hwEA3JRy4k/...
[ "triangle", "circle" ]
null
0
math
grade-8
identify-similar-triangles
false
true
Are these shapes similar?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAGICAYAAAB7tZdvAABTiklEQVR4nO3dd3SU1d7F8e9kQnqDIIYg0lsSmgooHelNAbliR1C4GLGjYsVyVUCxAyIKyqt4Qa8G6UW6BSxAGiBIQCAEBExPmJR5/wgTQDqZmWfK/qzF0kxm5tkxLtic/J5zTFar1YqIiIiIiNiFj9EBREREREQ8iQq2iIiIiIgdqWCLiIiIiNiRCrYDzZs3D19fX3x8fHjhhReMjiMiIiIiTqCC7UA33ngjxcXFtG7dmmbNmhkdR0REREScQAXbwaxWK8nJySrYIiI...
[ "no", "yes" ]
null
0
math
kindergarten
cubes
true
false
Which shape is a cube?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJ8AAACfCAYAAADnGwvgAAAV1ElEQVR4nO2dT3ATx57Hv90zY8myjG3Z/DO2gQ04Ba9AVFK1kEOWh3dzIZXkkPBOwF5IZas24RVv3152w15I1R52U4+XZA8bksNCbpscQhZOLCzkAMkhhZ2qULGdB0YC88CSZfTfmuneQ2tGki0bS5rR6E9/LpbHo+mW+6vfr3/959eEc84fLQLTKSBuADqHROIIKgG6FWCnD9jYAZBHWc6/f+p2tSTtxv51gDqVEr9s7gCe7xLKlEicIG4APyeB2UVgMgXQp7r...
1
math
grade-5
range-find-the-missing-number
false
true
Matthew has the following data: If the range is 9, which number could x be?
"iVBORw0KGgoAAAANSUhEUgAAAQ0AAAAkCAYAAACTxm9CAAAHYElEQVR4nO3c61NU9x3H8fdeYLkvAuIF5H5XguK9NtYQQaWk6ug4adO0to3NA9Npp32SR/0T2kmbVmsbbW0uatMkUyuJVqOlGQzoVhQlXORS3QXkIqIssPc+gKFdNXoW9uyBme/rGb9z5vw+c77Ld8/+ztnV+Xw+H4DbDePj4PUCPoQQAnSg10NEBBiNk0M+n8/nGAeHQ9tsQojZzWQCUwQYPW5pGEKIp3M4wGAEvTQMIYRSTgfoPR6tYwgh5gqPB/Q+WfQUQijk84F...
[ "74", "17" ]
null
1
math
grade-8
identify-congruent-figures
false
true
Are these shapes congruent?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAD8CAYAAABNcdMMAABlzklEQVR4nO3dd1RU59bH8S/VoQgDImLBgqCxYTegxthj7Bh7r9EYfa/mppBmYrBFExuxxhaNGkswqDFqUJOo2BURG2DBAoogA4LShnn/QDBcOw6cGdiftVhXz8w5syfryvx42OfZJjqdTocQQgghhBBCL0yVLkAIIYQQQoiiRAK2EEIIIYQQeiQBWwghhBBCCD2SgC2EEEXY7du3GTZsGK6urpQuXZqaNWuyatUqpcsSQogizVzpAoQQQhSc/v3706hRIyIiIlCpVJw...
[ "no", "yes" ]
null
1
math
grade-6
understanding-percents-strip-models
true
false
Which model shows 80%?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAVAAAABLCAYAAAAmjt81AAACLklEQVR4nO3XQU5TURTH4fPawgBBJ0bjAtQlsAYGbsGZI7fAkC04cuYScMAe2AHiXIyOKDQBKdfBSxMTlbT/QGrl+ybty+vNPaNfTrvWWju5rPo8qRpPq65aAfAHo65qa1j1fKPq6XpVd3LR2uHpsscCWC3bD6tGx5P+4dl61csHfV0B+N14WnV0XvXlsurTpGpwetW/EE+Am20N+1ZWVZ1NqwbTX14AcLNZK3+0qsFyRwFYXQIKEBJQgJCAAoQEFCAkoAAhAQU...
1
math
grade-1
certain-probable-unlikely-and-impossible
false
true
If you select a marble without looking, how likely is it that you will pick a black one?
"iVBORw0KGgoAAAANSUhEUgAAAMYAAACECAYAAADLC1Q6AAA6iUlEQVR4nO29eZheVZXv/9nnvEPNcyVVqUhCBpIQ5kGUIc3QDIpcZGhQEGxs+wrca9tCq63Y3WpDhMsVG20blLb7J6hAi8Y8PlcEsWVshiTNFEhCJjJUVZJKzcM7nbP374+99xkqFagpleldefKcOu94znn3Omv6ru8SSilFUYpSlJg4+/sAilKUA1GKilGUoowgRcUoSlFGkKJiFKUoI0hRMYpSlBGkqBhFKcoIUlSMohRlBCkqRlGKMoIk9vcBHOjS2pnnra0ZdvY...
[ "impossible", "unlikely", "certain", "probable" ]
null
1
math
pre-k
different
true
false
Which is different?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAHwAAAB8CAYAAACrHtS+AAAJDUlEQVR4nO2d/VcUVRjHvzs7L8vu7CIvgksRBwERDLEiQ0MFDlhmacif2TmdY/3kCUQOlhWlhRUvkpYrCLT4wjKz7Ov0w7SGxhLM3Hm993POHg8HduZxPvPce+e+TUDTNG0lCyyqQKoA5DUwfAQfAKJBoC0M1ItAYCWjad9vOB0Www7eiwH8PVX/IS4C7RH9bmD4h1QBmFeAx1lgQQW4jbz+Cybbn0SDulsA2CwAXGHbLxj+pOQ2pwGcs6Ew7IYJpwwmnDKYcMp...
2
science
grade-2
compare-properties-of-materials
true
false
Which is scratchier?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAKUAAADCCAYAAAAo2gI4AABSO0lEQVR4nO29d3xkV333/z63TpU06lpJq+292euy7t0GDNh0gnmAAOEJoYeSJzgJ+eWVJzyE5yGBQAyJMc0BDCQGG2xsY4zr2uuy69319t7Uy2j6bef3x50ZzWglrbSrZkef1+tqRnduOeeez/228z3niOfjUi4PQ1RlDnOYViRc2JuCdgtiGlxe5e9X5gg5h5lCVIXlYf970h3ar8wRcg4ziQL/bDm0T5mZosxhDqNjjpRzmHWYI+UcZh3mSDmHWYc5Us5h1kG...
1
math
grade-4
sides-and-angles-of-quadrilaterals
true
false
Which quadrilateral appears to have 4 equal sides?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAADgCAYAAACaXl3yAAAIyklEQVR4nO3df6jV9R3H8ee593pL04QLOhNR8DLnxaWWtnvVYSNpFmlzjtbIq7WNMdtAgvprY6wx1j8bTIxW+2NjlPthhUYJroKFA90tlX5ISLYrKKPdKQh61fx1d/bHx8O9u37vzXuv937P+3yfDzikt38+5JPTq3s+31upXC6Xuy7CP89Bdw9cLiNVnYYSTKqHz0+AzzVCqetCufzO6byPJV271puh4eNz6Te3NMIXbkpVS9Wmuwc+Ogv/vgiHz0Hd6cvpbxi...
1
math
grade-5
rotational-symmetry-amount-of-rotation
false
true
This image has rotational symmetry. What is the smallest fraction of a full turn you need to rotate the image for it to look the same?
"iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACtWK6eAAALhElEQVR4nO3dy24b1x3H8d8Mr0PxYssWpTgoUKANcgEKtPBD5CUctG8RL7NMXqJoiy6K5gnyBt5k6TSLboICjkhLtkhKHPE6XVhjUxIvM5w55/zPmd9nl0QmJ5r5euaQf3IAIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiJKzTO9Ac74JvL/9OLsby+fHH41Lfmmt0aZ5mSGT3sX3/34Q/e56W3Rwd09qdM3kf/0xeu/+lH0VXcYmt4apY5HIQB8/fTL/re...
[ "1\n3\n of a full turn", "1\n5\n of a full turn", "1\n2\n of a full turn", "1\n8\n of a full turn" ]
null
2
math
grade-3
open-and-closed-shapes
false
true
Is this shape open or closed?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABkCAYAAAC8REciAAAMI0lEQVR4nO3dMUzbBxbH8V+qDsSBIIEEA2YIEUgB4XS02YoCREmkCzpgCW2qg14y3FDMEOl0bUhTndRIsTPckFQkalNYMFKIFKpQENn4e8UITjKCG+wOrgSSiTHduMGxC4EECH/7b//9/YyG2E9MP7+8/3sntre3twUAAADAFB9ZXQAAAABgJwRsAAAAwEQEbAAAAMBEBGwAAADARARsAAAAwEQEbAAAAMBEBGwAAADARB9bXUCurCxGlXy9pZAR3vOzamelqmsr1ey...
[ "closed", "open" ]
null
1
science
grade-3
natural-resources
true
false
Natural resources are useful things that come directly from nature. Which of these pictures shows a natural resource?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAV4AAAElCAYAAACszooYAAEAAElEQVR4nOz92ZJtWZaeh32zW/1ufHtzzom+kJmV1aERDTDQSBCiSaJeRRd6AT6Anka6lJlMMuoBZFYsCSAJVGYhI5uIOJ03u13tbHUxd5wEzUAJqhTvct/EieMeHr73WmvMMf7xN+KvTyn9vIWV4o+vP77++Prj64+v/z++LgF+OcB7Czca/sU2/738Y9H94+uPrz++/vj6n+e1UvDzNv+5D7//e/nHovvH1x9ff3z98fU/3+vHGuvS7/9O/4e+8f/0f/zf8/7...
0
math
grade-8
identify-similar-triangles
false
true
Are these shapes similar?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEkCAYAAAAVa0b6AABMKElEQVR4nO3deVzUdf4H8NcwjAw6AiKoKAoKcqOoSdrhiZoHGt7mkVZmlmWrltpudt9bv+1ySdu07PBWFDMFC4/yVm45BRS5IUCO4Zr5/THOJF55zMxnZng9H48erXN9X7Pt5ouv78/nI1Gr1WoQEREREZFeWIkOQERERERkSViwiYiIiIj0iAWbiIiIiEiPWLD1oLCwEPPmzUPXrl3h7OwMPz8/rF+/XnQsIiIiIhLAWnQAS/DYY4/hvvvuQ3p6OuRyOc6cOYMRI0a...
[ "yes", "no" ]
null
1
math
kindergarten
spheres
true
false
Which shape is a sphere?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAACuCAYAAACvDDbuAAAWTUlEQVR4nO2dTXAbx5XH//ONjwFIAqREyinCVWtqbUm7VZZcG/sg+aKtWHFyWPuQS5zLHuTr5hzfkrOv0WFP9iUHabeSiuRUJQdTh01SFlW1pY9E8lYZrDIJmQAoAIMB5qNn9tDoIUBCIiXOYGaA/l0kQSTQmP7Pm9evX78n+L7v12zgaxPoEMD1weEkDlkAChKwlgNOqoBQs3z/r+24h8XhHJ3vFwH5sUn/saIC/5inquZwkkaHAH/vAts28MgExLZL/4OLlpN...
0
math
grade-4
fractions-of-a-whole-word-problems
true
false
Brittany's class is learning about how people throughout history have made cloth into clothing. Her teacher takes a strip of cloth and divides it into 8 equal sections. Brittany dips 7 sections in berry juice to make them colorful. Which model represents the fraction of the strip of cloth that Brittany dips in berry ju...
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAU8AAABKCAYAAAA7d9b1AAACG0lEQVR4nO3cQU4TcQDF4dcWWCgoCxPjAYxHYOsFPIQcDO+gF3DNDVD3kuiCUCABacZFIUEjCX2BtJjv2zST6SRv9ct/Fu1oGIbh8CL5dpZMZ8nlEAD+sjZKtibJ6yfJy41kdHg+DPvHy54F8HjsPEvWvp7NL15tJG+ezssKwJ+ms+TgNPl+kXw5S8bHl/Mbwglwu63JvJNJcjJLxrMbNwC43XUnfw3JeLlTAB4n8QQoiCdAQTwBCuIJUBBPgIJ4AhTWFn3gaHf...
2
math
grade-6
compare-area-and-perimeter-of-two-figures
true
false
Which figure has a greater area?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAANIAAAB7CAYAAAABit5kAAAFK0lEQVR4nO3dzUtUCxzG8edoIzLXrviCelcipBLRyoWgYIMvSISLwPIs/A9MUaSFiCBY4D+QoFC0ETSIIPcJuqoYQilM5y4kF9dLg/iOpXLu4qRcsVvq/Mbj3L6fzXg4M/Is/HIcmXEcz/O85a/Sn9vSxr605wnAT1xypMvpUmlYKsyQnOUvnvdmPehZQOqq/F26FNv2D/7IkMp/8ysD8GMb+9L8lvTXV2lhW0pb3/NPEBFwcpfT/WYkaXNfStv/1wkAJ3fQzK4...
1
math
grade-8
identify-similar-triangles
false
true
Are these shapes similar?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAD8CAYAAABNcdMMAABFHklEQVR4nO3dd3yN9//G8VdyksgwIgiiYoTYqWopRdGW2moTm6r9s2uv2itozRqx9x5FVbU1ivqiCTFrtaRmhoSIjN8fqbSaLnKSOyfnej4eeci5z33uc92+33K58zn32yY+Pj4eERERERExC1ujA4iIiIiIpCcq2CIiIiIiZqSCLSIiIiJiRhZfsDt06IC9vT2Ojo44Ozvj4+PDvn37jI4lIiIiIlbK4gt2YGAga9asISoqioiICHr27EmzZs2Ii4szOpqIiIiIWCG...
[ "yes", "no" ]
null
0
science
grade-3
identify-minerals-using-properties
true
false
Select the one substance that is not a mineral.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAANcAAAEGCAYAAAD2aACLAAEAAElEQVR4nOz9aZAl2ZXfif2u7+5vX2Lfct9r34EC0GgQ7IXDRpPd1JCScTNSlGkWmWnMZCbpk0xm0ifJ5sPIZEPN2IyJHLHZnCa72WADja2qUAtqr8rMyj0zIjL2iLevvvu9+vAiqxLoAopkoRrV6Pybpb3I98Jf+PN3/n7OPfec/xFv95U6nYOCzgM8wAP8R2CYwc0x7MVQMeD58uR57QGxHuABPh0KOpzOTX4eZR89rz0g1gM8wKfHPR4l6qPnjI/7RaU+7tl...
1
math
pre-k
ordinal-numbers-up-to-fifth
false
true
The first picture is a fish. Which picture is second? first
"iVBORw0KGgoAAAANSUhEUgAAAaUAAABdCAYAAAAFZHluAAAiuUlEQVR4nO2dfXRTVbr/P2lTbZO+QIGmheJQICiVtrz8lBakPxREqUuLDoLC9WXoknFmBGFg7ohwFWbKwCgOKHjliq1vC+Vt0OpQBqYoAyJ1/YTSFsFrLEWotkGpNk0bpGny++M0adom6UmaNmm6P2tlmZ7ss8/mu5bPc/bez34ehdVqtSIQCAQCQQAQ4u8BCAQCgUBgQzglgUAgEAQM3eaUfmqyknTAwLiP6vmpSawQCgQCgaBzvHJK71c3sebLK26dzeEfzJxvtHC...
[ "sub", "turtle", "fish" ]
null
2
math
grade-7
similar-and-congruent-figures
false
true
Are these shapes congruent?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEZCAYAAACtj1KJAABdhElEQVR4nO3deVjUZdvG8e8Aw46gggtuifuG+64laWWKiopKLrmWS5qmLeZTlqVW+lqWWZa5a+W+ZlpulWXuCu67qCgKCgrIPu8fCGruOjAwnJ/j8DhymPn9rnkexNN77vu6DCaTyYSIiIiIiJiFjaULEBERERGxJgrYIiIiIiJmpIAtIiIiImJGCthAz549+fDDDy1dhoiIiIhYAQVsICQkhCpVqli6DBERERGxArk+YKempnLgwAEFbBERERExi1wfsI8ePQpA6dK...
[ "yes", "no" ]
null
1
math
precalculus
solve-a-triangle
false
true
In solving this triangle, which law must you use first?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAG1CAYAAADDUYMcAAAwA0lEQVR4nO3de3TU9Z3/8dd3MuYiDEzCpdLFEKFI1QPWYzGcukwohaB2266nyB5F97T66253j1Z73KK7ioqXXaHds6tVT+tt7S66LUf31PZ3RNCtJKw/g1bPabJLBaTESG0WIzM4YDJxZr6/P2a+ZBKSmUkyM9/b83GO/5gAHzHgyw/vz/tlmKZpCgAAAEBJBOw+AAAAAOAlBGwAAACghAjYgEv8x3/8hwzDyPvXT37yE7uPCQCA7xnMYAPutmfPHq1Zs0af//zn9cI...
[ "Law of Sines", "Law of Cosines" ]
null
0
math
pre-k
one-less-with-pictures-up-to-5
true
true
Count the cookies in this group. Which group has one less than the group you counted?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABmCAYAAADxjOYpAAA3tElEQVR4nO3dd5Rc133g+e8LVa9y6Fwd0GhEAmAEmIMo0RZti3SgJVuSZcuzSraPx7te2ZqwM7taj2fmnF2tZe2xPU6SLK9lS5YtSrJI2RaDRIqUmACSIHLogA7VsXKu997dP6ojuhtoAN1Ak/x9zuEBu8J7r+r1795f36gppRRCCCGEEEKIdaFf6wsQQgghhBDirUQSbCGEEEIIIdaRJNhCCCGEEEKsI0mwhRBCCCGEWEeSYAshhBBCCLGOJMEWQgghhBBiHUmCLYQ...
null
[ "iVBORw0KGgoAAAANSUhEUgAABIYAAAB+CAYAAABRYRpnAABscUlEQVR4nO39d5wc13nge/8qdHd17p7pCT0BE5ABZoA5SVSyRMqyghVtea+V7Nf2vb60tWv73l2v1+vd+zrIvu+uMyVLtrSSg6hEyVaiRIqZBJiQ08xgcuycq+q8f/REYAYYhAGGnOf7+fBDTIfqqjr91Onz1AkaoBBCCCGEEEJcFj+aqPHUtA2AhgK0q7tDQgghxBIKhQYK7kqYmFd7d4QQQgghhHg9eXraXpQKkqSQEEKI9Uar104aPDltS2JICCGEEEKIy2m...
0
science
grade-3
identify-minerals-using-properties
true
false
Select the one substance that is not a mineral.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAANcAAAEGCAYAAAD2aACLAACRZUlEQVR4nOz9d7Ql2X3fh352qHDSzbdzmJ4cgRmkwQAgCICZYpRMUqIoUU9WoPS8vJYVLMu2lqRnv+ew1vPT81rPskVZlkXKCiQlUcwiCSYABIhBGgAzg8nT09Px5ntSVe3w/ti76px7+3b3JGDubfSvV3XVPRVOnar93b/8+4nPbnp/Twd6ilt0i27RG6BtC18bwIUS5jV8aC58Lm8B6xbdojdHPQX3dMJ2304+l7eAdYtu0ZunGkeVn3ym355b+TqSB6q4LQA...
0
math
grade-6
identify-trapezoids
false
true
Is this polygon a trapezoid?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADiCAYAAAB0rbDnAAAb2ElEQVR4nO3de3Qc5XnH8d/sTSvJki/YxgbHF2x84WLAJEBtEkgIKZTSpk1CTnpCTlJCm6ZpAgScBHJyQokD4ZbASSg5bdKGwB+5nFIOSQ5tSrjZDphLQcRYtpGvAl+QLUu2pN3ZnZn+YaN5FVbSjjSzu7P6fv5ayVKYA568v3nmeZ/X8jzPEwAAAIBQJKp9AQAAAEA9IWADAAAAISJgAwAAACEiYAMAAAAhImADAAAAISJgAwAAACEiYAMAAAAhImCjoq5td3TGOlu...
[ "yes", "no" ]
null
1
math
pre-k
are-there-enough
false
true
Are there enough straws for every cup?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEECAYAAAASx0PMAABAz0lEQVR4nO3deXRd533e+++7z3wwzxNBcAIpipREUZI1j7YlO5It2bLlDE3iJE1qN83q6mri1Tbxvbe9TXNX7CZNk9zYbdIkjnPtOHYsy/IgybEmy6EGaiTFeSZAzDgYznz2fu8fGwRwCNCSXYgHG+f5rJUs6kx4D56F/f787ncw1lqLiIiIiIisCKfSDRARERERWUtUYIuIiIiIrCAV2CIiIiIiK0gFtoiIiIjIClKBLSIiIiKyglRgi4iIiIisIBXYIiIiIiIrSAW...
[ "no", "yes" ]
null
0
science
grade-2
identify-earth-s-land-features
true
false
A plain is a wide, mostly flat area of land without many trees. Plains can stretch for many miles. Select the plain.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAOEAAAC0CAYAAABi8Es+AAEAAElEQVR4nGT92bNt2XXeif1mt7rdnOZ2eTORSIAASAIEKBZVsmSpSlUVDkfZUeUIO8KP9ovf/GD/Pw6/2BEVjijZVZZsqeRSqSEpgQQgkCAIEB3RJRKZebvT7G51s/PDmGufC/sikHnzNvvss/Ycc4zxfd/4hvrf/x/+j3n2E5XTnMYZ7yPWanJOQGYaA2234qtf/QPee/+3UNpAziilUEAmE2Mip0Qs/88pQc5kkJ+T0UqRScSYSDGScybGSAiBGDMpZWLMxCS...
2
math
precalculus
find-limits-at-vertical-asymptotes-using-graphs
false
true
The graph shows f(x). The dashed lines are vertical asymptotes.
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH3CAYAAACBwSh7AACGQklEQVR4nO3de3hU130v/O/cLxrd0J2LhDE2tghgg8HGBhsHYhPbcYMdv056nNtpe9KcXJq+bd+0OT3J0xw3p7e0b9okdfqeNHbqPEmD41wMFjYO2GAwBmQsg8AYY6MLQpeRRnOffX//GM2AQBIjaS3NjPT9PI8fo9Ger5ZGs/f+7TVrr2WzLMsCEREREREJYc93A4iIiIiIZhMW2EREREREArHAJiIiIiISiAU20RyyZ88eLF68GPfff3++m0JERDRr2XiTI9HcsWX...
[ "$\\lim _{x \\rightarrow-1^{+}} f(x)=\\infty$", "$\\lim _{x \\rightarrow-1^{+}} f(x)=-\\infty$" ]
null
1
math
pre-k
flat-and-solid-shapes
false
true
Is this shape flat or solid?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAD1CAYAAABqfoLEAAAFAklEQVR4nO3YsQ2DUBAFQUDU6cCFOaDRcwkmWOtLaCa+4IWr22dmNgAAIHGsHgAAAE8isAEAICSwAQAgJLABACAksAEAICSwAQAgJLABACAksAEAICSwAQAgdN6+vN5/nAH89PqsXgAA3OCDDQAAIYENAAAhgQ0AACGBDQAAIYENAAAhgQ0AACGBDQAAIYENAAAhgQ0AACGBDQAAIYENAAAhgQ0AACGBDQAAIYENAAAhgQ0AACGBDQAAIYENAAAhgQ0AACGBDQAAIYE...
[ "solid", "flat" ]
null
1
math
calculus
determine-one-sided-continuity-using-graphs
false
true
Is f(x) continuous from the right at x=3?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH/CAYAAABtkqoWAAB6gUlEQVR4nO3de3QU550n/G/fu3Vt3ZCE0AVxERZIGBmMudl4cGzHThyD49hxbs6byayzySSZsztncrLz5j0z4/XJ7Gwym0zizWY3azu7SZyQYDsGC4INBiwCAhkEEjch0F1qqaXuVl/r0lXvH41kBAgkqIdWo+/nHJ9Era4fP1V1V3376aeqTLqu6yAiIiIiIkOYk90AEREREdGdhAGbiIiIiMhADNhERERERAZiwCaiCfbs2YOKigo8/vjjAIBPfvKTeOONN675XEV...
[ "no", "yes" ]
null
0
science
grade-5
evaluate-natural-energy-sources
true
false
Below are three examples of using energy from natural resources. Select the use of energy that did not add to air pollution. Hint: Burning a material such as wood, oil, or coal releases chemicals that add to air pollution. The engine on a garbage truck burned natural gas. Many early railway locomotives had engines that...
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAp8AAADOCAYAAAB4pWlzAAEAAElEQVR4nOy9d7zcdZ39f6b33u6dub2lF3IhBJLQAqhBEQtNBF3BlXXVryigYt0VFZe1oagsCIIuiAuCugpICSGEhPTk5qbc3u/c6b2X3x/5vV9+ZjIzd24S0N19Px+PPDJ35tNn7p3zOa8m2h0uFhdpAJ0EHA6Hw+FwOBzOW0I0DxyPA6JIrljkwpPD4XA4HA6H81YTzQOiYrFY/FsfCIfD4XA4HA7n/wZS4Q9vvvkmisUiCoUCisUiisUiRCIRRCIRACCXy9H...
1
math
grade-1
compare-objects-length-and-height
true
false
Which nail is the longest?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAATwAAABUCAYAAAAf1YuFAAAK0ElEQVR4nO3dXWxT5x3H8e85x8fOC8R5p6U1pRcrlYhaaVSt6qiq1HYSqdYLtGlwUXWaJthVXyTCdtVdlN10bSXKVE0FTS1dJ8I6VKALybp1pUMJa1VasZLyUigQExwgIbFN3uwk3sVxTELCVh+fEJP8PpIVck7w81z99H9eznOMdDqd7k7CqUFIjMFoGhGRecFnwGILvlcCS/xgdI+k05/F57pbIiKz66Ey8H0z6Pxyux9WlDppKCIyHyTG4MQARJNwchDM+Kh...
0
science
grade-4
predict-temperature-changes
true
true
Two identical blocks are heated to different temperatures. The blocks are placed so that they touch each other. Heat can flow from one block to another but cannot escape from the blocks. Later, the temperature of each block is measured again. Which pair of temperatures is possible?
"iVBORw0KGgoAAAANSUhEUgAAAQQAAACgCAYAAADq8hJGAAAZrElEQVR4nO3deXAc9Z338Xf33CONNLolS8b4vjDYli+MDTYBHEhiQy4SlmN3k2zy7JPKJmE3Ic+zT2U39SSV7KbyJJtNZQnsLhASwpEEggEfwRh8YVu+L/m+ZN3HaGY0Z0/388dIjYVkS7Il9Uj6vqooyj3dPb/Rb/oz3d/+dbdiGIaBEEIAqtUNEEJkDgkEIYRJAkEIYZJAEEKYJBCEECYJBCGESQJBCGGSQBBCmCQQhBAmCQQhhEkCQQhhkkAQQpgkEIQQJgkEIYT...
null
[ "iVBORw0KGgoAAAANSUhEUgAAAiAAAAC4CAYAAADaI1cbAAAmBUlEQVR4nO3dd5Qb53nv8e+gY/tyC3dZJLE3UaJYRKpZ1ZItW8VVtmzJuXHLTXycyFXOTY7j3JucOPH1TbGTOHJiW3JcZVsyJYsiLYoSSVHsvfe+vWCxWNSZ+wd2QS6XZUliZwa7v885Ons4AAYP8L549GDmmRcGYCEiAliWRUMSDsSgKwNpZQcRyROfAaVemFIEowNgoAJERHo1JCzWRZyOQkSGu4Vl4HM6CBFxj/2x7N/6AEwrzn5bERHJh64M7O2G00nYFwO...
0
math
calculus
find-inverse-functions-and-relations
false
true
The graph below shows a function. Is its inverse also a function?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH8CAYAAADrBti4AABiIklEQVR4nO3deXRU953n/U+pqrRLSEggCWEJMIstLLHYYLPZODi2YyfuQJK2k5PF/aTTk0zcSfrp6X5ycnryTGc8npyn2+knju1JpycTOz05Tyae2O7YWCY4rBY2GBkEEhiEACEBWkpr7beW+/yBpSADRsL3R6ng/TrHJ1FV3Q9f3Vt161NXt6pctm3bAgAAAOCIjFQPAAAAAFxLKNgAAACAgyjYAAAAgIMo2ABG3XnnnXr55ZdHf/7d736nm2++WclkMnVDAQCQZij...
[ "yes", "no" ]
null
0
math
grade-3
compare-fractions-using-models
false
true
"iVBORw0KGgoAAAANSUhEUgAAAtUAAAC5CAYAAADnGsNjAAAs5klEQVR4nO3de1zN9x8H8Nf3qM6pTumeUm5hKXQhcs1dLjPXzXWGketcxrDNMGv8+P1mbBgbmzEyYSNLLiOX3CtMhFySayVFdD2f3x+tM0d3X6rl9Xw8PB4738vn+/58z3f1Op8+3++RhBACRERERET0whRlXQARERER0b8dQzURERERkUwM1UREREREMjFUExERERHJxFBNRERERCQTQzURERERkUwM1UREREREMjFUExERERHJxFBNRERERCQTQzURERERkUwM1UR...
[ "=", "<", ">" ]
null
1
math
grade-2
more-less-and-equally-likely
false
true
On which color is the spinner more likely to land?
"iVBORw0KGgoAAAANSUhEUgAAAXQAAABkCAYAAACWwst8AAAQHklEQVR4nO3deXBb9YEH8K98Sz70FGyCAduJc8dHYkkmaThCHNItG4csMEDsXMSE7bTTodNtkmZnl7JLZygQugO7ne70SMxC7ADFhISrQEK42kAiOZcN5MK5mhJfepKsw4ol7R+s2RBLsuxI76cnfz8zmcxE8ft99c93nn+/33s/TTAYDIKIiFQvRXQAIiKKDRY6EVGSYKETESWJNNEBRsPlckO2y5BtMmyyDLssAwD0kgSDJEEySJD0ErKzdWKDEhEpSJPIi6JdXV2...
[ "neither; white and yellow are equally likely", "yellow", "white" ]
null
1
math
grade-5
multiplication-input-output-tables-find-the-rule
false
true
What is the rule for this input/output table?
"iVBORw0KGgoAAAANSUhEUgAAAFgAAAB/CAYAAABrPAW6AAAKB0lEQVR4nO2dbUxUVx6HnxkYGJCRARFY5GUQsWt86SYuNSWBbLdWBNZ+MCVLFrVdUWOarbWGJsiGWFQSamvZpqZrDKatsSW2SZPiSke72y0m7soHGombYFpFF4rDDig4LwJzh7n7AWdcVpJCOQdFzpPMhzn3zvn983DmcOfec2cMV37XpTMLSKmL52bl7YddxpR44uM0jA+7iMcdJVgySrBklGDJKMGSUYIlowRLRgmWjBIsGSVYMuHTeXHKHxYQkWriRmWvqHqEYDQ...
[ "× 7", "× 9", "× 4", "× 2" ]
null
3
math
grade-6
nets-of-three-dimensional-figures
true
true
Which net will make this figure?
"iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAYAAABw4pVUAAAQ8UlEQVR4nO2de1hU9brHP8NNBGFQuZggQyleqic8WZ1T1oHdk6ZUYtnOSnNUkO32Cl62uBMH9EieUJlSj1c2I0rGli0cdHspadAjmqUJJYGh3FJAARHGQW7DOn+MMzsNlcsMMyCf55k/Btb6rZf58rzr997WiARBEOjBbLAwtQHmQHJyMpGRkRQVFZnaFBAeYS5fviyMGzdOAPSvsLAwQa1Wm8ymR1IQtVotLF++XC+Cg72d8NyIYfr37u7uwpdffmkS2x45Qfbu3Su...
null
[ "iVBORw0KGgoAAAANSUhEUgAAAUkAAADlCAYAAADeIwWJAAAZQ0lEQVR4nO3de1yUZd7H8c+AR1DwhJaaeADPhecO+oRbVptlamVZu4kHPLSUoq5b62biltYuKZha5GFFy6fcNHioVWvXBd3UPG2w6zEKwRU8gKkgxGmY5w+aSRTvFQTugfm+/+HV/ZKZ393MfLmue+7fdVkAG+I0bDYbZwrh2zzIsUKxXh2RGlXPAk3dwd8D2jQACwpJp3KmwMa+bLOrEBGAO72gntlFSFnJeaU/b20A3TxL/6KJSM3JscLxXDhdCN/kgZvZBUl...
0