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-6
compare-area-and-perimeter-of-two-figures
true
false
Which figure has a greater area?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACKCAYAAABSKVOMAAAHFElEQVR4nO3dX0iTexzH8c+jzspz5oHZOnYiAstzWhdmUSj+oSQ1UNxiFc0s1oVXwbo5Xg2Koqsig/7ddLGgbjQW0jkOIoSNCYsOFWKWnU4gFk6j1h+dM9fsORejkXigc47Pvk/TzwuGbr9H9x2+fZ4NZY+iqqo6FgeexYCJGSChgmjechTAmA0U5wE/5gLK2LSq/jGu91i0kJXlAzl/xZJXVuYCv3yXrJBoviZmgD8ngdE48DQGZI0nkguMjLRkzE42BQDRGSB...
1
math
grade-8
identify-linear-and-nonlinear-functions-tables
false
true
The table shows a function. Is the function linear or nonlinear?
"iVBORw0KGgoAAAANSUhEUgAAAFQAAABeCAYAAAC98DOnAAAIrUlEQVR4nO2cbUhT7R/Hv5upL8ok09hcOvNZLIcLlSSLTMxCqcD/ZMyiEkeiGIL5okAiRUyqaYozY5beWnKXpcXdzBeSvYgRRWVlhuUDaoJamA/oWtv1f3Ez73s92Y7XqeS+PuCLXefs9/3x9TrnOtv57uDPv+6QpcBS6VMIBlWYoZRhhlKGGUoZZihlmKGUYYZSZhlfhefm5lBeXo6bN29ibGwMnp6eUCgUSE9Ph4ODA1+ydvHq1SskJCR8c/uDBw/g4eFhV03eDM3...
[ "linear", "nonlinear" ]
null
1
math
grade-2
write-subtraction-sentences-to-describe-pictures-up-to-two-digits
false
true
Which subtraction sentence does the picture show?
"iVBORw0KGgoAAAANSUhEUgAAAfQAAAD6CAYAAABXq7VOAABCtklEQVR4nO29eWwc95n3+a2rTzbFQxLFS7REUYdFypYd2bIcJY7HjhMfsR0ni7zx67wzyGCCAPvHzGKDMbyYBItkE3gmCBbJYgIssHHGsbGOR57kNTZO/NoTa2xrLPmSLImUTIoiKd7Noy92V9e9f7SaZLOvOrrJZun5/GN2dddTv48e/35PHb+qYgzDMEAQBEEQxKaG3egGEARBEAThHCroBEEQBOECqKATBEEQhAuggk4QBEEQLoAKOkEQBEG4ACroBEEQBOECqKA...
[ "46 − 5 = 41", "47 − 4 = 43", "47 − 5 = 42", "46 − 6 = 40" ]
null
2
math
algebra-1
interpret-the-slope-and-y-intercept-of-a-linear-function
false
true
Jackie, an oceanographer, used satellite technology to measure the depth of Gull Bay over several years. The bay's depth changed gradually during this time. This situation can be modeled as a linear relationship. What does the slope of the line tell you about the situation?
"iVBORw0KGgoAAAANSUhEUgAAAjMAAAI0CAYAAADoV6h6AAB5b0lEQVR4nO3de1hU950/8PfMwFy4joiCgCAXuYuBqGgUIyGJ1sQEdA1aE0Oy69P0Ettdt7v7+Ouvv103ydM+u+m6tt3tulaSNG0TqYkxIlFDVBQj8YLIHYwygAoywHCdK3N+f4yMThgViMxw9P16nj5P5zvfOeczJyPznu/5nu+RCIIggIiIiEikpO4ugIiIiOjbYJghIiIiUWOYISIiIlFjmAGwdOlS7Nu3z/54//79SEhIgNVqdV9RRERENCoMMwBSUlJQXV1tf/z...
[ "The bay's depth increased 2centimeters every year.", "The bay's depth increased 1centimeter every 3 years.", "The bay's depth increased 1centimeter every 2 years.", "The bay's depth increased 3centimeters every year." ]
null
1
math
kindergarten
one-more-with-pictures-up-to-5
true
true
Count the snails in this group. Which group has one more than the group you counted?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABmCAYAAADxjOYpAAAfnUlEQVR4nO3deXxddZ3/8de5e/Z9bZO2aZo2bdM9XSmUpa1sU5ABUURBQHFEUIfHCIoKzijjD5URf6MizIjLDKKgbIKA0CptSte0Tdp0SZpmaZa22bd7c+893/njdkuTFpC0oe37+Xj08eg953zP+Z7z1zvfx+f7/VrGGIOIiIiIiAwLx0h3QERERETkXKKALSIiIiIyjBSwRURERESGkQK2iIiIiMgwUsAWERERERlGCtgiIiIiIsNIAVtEREREZBgpYIuIiIiIDCM...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA7sAAAB+CAYAAADlVwZsAABWaElEQVR4nO3dd3Qc5bn48e9sX/VV712yJVnuvYHB2DRjOgQCIaGkEci9ye+GEJLADbmkQ8i9SUgIISEJSaihdwy4ypZkW7JkW5Jl9b7Srsr2md8fK8uWJcsGbMtWns85OUazU96ddyfneeZtCqAhhBBCCCGEOCk0TaPdC7VD0B8Av0TbQpwWBgXC9ZAXAgkmUJBkVwghhBBCiJOm3aNR4pzsUgjx721RBBgmuxBCCCGEEEJMJTVDwX+TTDAtNNjSJIQ49foDsG8...
0
science
grade-3
classify-fruits-and-vegetables-as-plant-parts
false
true
People use turnip plants for food. We usually eat the part of this plant that takes in water and nutrients. It holds the plant in place in the soil. Which part of the turnip plant do we usually eat? People use turnip plants for food. We usually eat the part of this plant that takes in water and nutrients. It holds the ...
"iVBORw0KGgoAAAANSUhEUgAAARoAAADKCAYAAAB6+o8hAAEAAElEQVR4nOz9Z6xu15nfCf5W2unNJ59zc2ImJVJUlkqppCq5qlx2w2VXstvd03YPxsAAnoABxhNgzIzRX8aG2+1uz9hl97jttj1d5aqSpVKqUilSIilSDOJlvLzx5PDGnfdaaz7sQ9oGur8WGxgv4OBcEOee+/J993728/yffxB/7a/9Nc9/OP/h/Ifz/xfnb//tv/2e/LsaoO5HSCkR0lM3DXVt8QJMGGPCAGcFJk7Y2dmjbjzjacrdu9vESQ8ThphAkWVzjHbEgeW...
[ "the leaves", "the root" ]
null
1
math
grade-3
correct-amount-of-change
false
true
You pay $4.31 to buy a strawberry milkshake costing $3.53. You receive the following change:Is this the correct amount of change?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACSCAYAAAB/j70mAACYd0lEQVR4nOz9d5ycZ33v/7/uOvf0ndnZ3rSr1ar36iI35G4MmN4JCZCQCiEn7XASSMjJ7+SQQEJJaKGZZgzGxrjKXbLVe5e2992Z3ekzd/39MdpB4hgjGdnmi6/n47EPabWjmfu6d/947zWf6/ORPM/zEARBEARBEAThkpBf6QsQBEEQBEEQhN8mImALgiAIgiAIwiUkArYgCIIgCIIgXEIiYAuCIAiCIAjCJaS+1C/guQ7FQoF8NkMumyE9O0thNkm+VEYGwrE44Zp...
[ "no", "yes" ]
null
0
math
kindergarten
represent-numbers-with-pictures-up-to-3
true
false
Which shows 2?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAOAAAADgCAYAAAAaLWrhAABJXklEQVR4nO3deXhc9X3v8fc5M3NmH81IGkkz2hdrsbXYlrFks4PBEMySpC1JKOGhaZY2t0l44LY3SZc8geQ2KbkQ8tz03gvN1iYNNECAJISAwTbGuy3bWixr3zWSZjT7dmbmnPuHbKcuYHgKYyX1ef3DY888Z37zffzhd86c8/v+BFVVVZ8MIwmI5iCrotFo8kQvgF0HayxQKoHgS6vqochqD0ujufR0OUA/nFj5g0eCJutKOjUaTX5Ec3A6DvMyDCVAjGRXXtD...
1
math
grade-2
place-value-up-to-thousands
false
true
What is the value of the underlined digit?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAAiCAYAAABlRa5TAAAGvElEQVR4nO3dW0iU3xrH8d+MhWdT00KSKKJIMaLQytLKMEiRGMIy8qKoLiY7QqCCEJ0gOpBdpCiKeVNR1IURaRQUGinUhFmokaBRWmDWmGYW6fwv4v/uJsepxql2e38/MLDWzLPWei6fWaz3XSaHw+EQAAAAAK8w/+kEAAAAgP8lFNgAAACAF1FgAwAAAF5EgQ0AAAB4EQU2AAAA4EUU2AAAAIAXUWADAAAAXkSBDQAAAHiRuaqqSiaT6Yc/Bw4cGNOCa9eudZpv+vT...
[ "100", "1,000", "1" ]
null
2
math
kindergarten
select-three-dimensional-shapes
true
false
Which shape is a cube?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAACuCAYAAACvDDbuAAAOUUlEQVR4nO2d228bZRqHf+OZ8Sk+JPYkaUuhwEKhFO0FAtEFBNJysXuzd3uz/8De7d+22gUJVVpAgLacqlKBQNs2ByfN+eDETu3YHk9mL8afz4exPY49M7/npoljJdP4yed33u99308yTdPcqwArReDMAKomCJk5FAmIy8CrUWA5CEh7ZdP8IT/tyyLEPu8mAOVJ0frkahB4bc6ympBZ48wAHhWA3QrwuAgE8lXrC5SWzDJx2XIUAJ4ZQMBo+gIhs4xwVDeBwHQ...
1
science
grade-8
use-punnett-squares-to-calculate-probabilities-of-offspring-types
false
true
In a group of muskmelon plants, some individuals have sour fruit and others have sweet fruit. In this group, the gene for the fruit taste trait has two alleles. The allele for sweet fruit (f) is recessive to the allele for sour fruit (F). This Punnett square shows a cross between two muskmelon plants. What is the proba...
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAD6CAYAAADUdTPBAAAJ+ElEQVR4nO3dT2jf9R3H8fevSbPEtDYd/TdG2AJtPQiZjohg8U8rYzAdjB6GLTm5g5Aheh4UdihlePKgl+FFpuJpQ3eZjDk8BDr4SQ9jepKJMiWdInRtltJ0vx2msZ3/EvPr9/vL6/d4nNJfv7/f703fl2c/+eaXTq/X6xUAABBhW9sDAAAA/SPwAQAgiMAHAIAgAh8AAIIIfAAACCLwAQAgiMAHAIAgAh8AAIIIfAAACCLwAQAgyGjbA/BZ586dqzNnznyt5y4sLNT...
[ "1/4", "2/4", "0/4", "4/4" ]
null
1
math
grade-4
compare-fractions-using-models
false
true
Which fraction is greater?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAC5CAYAAAAS5EjTAAAf4klEQVR4nO3dbYyU9aH38d9WTMBSZrAmrbR2BnjhYzpzqtVia3f29PG0Hne5jWhim53NsYTbN8zqOdpXZfZumng8R3f2TpuKpx6GW9pYttFBSAwPkQtEIJFtZmkXTcwu1xZZFBvn2oY6tB7lfjFcsw8uMA/X4+z3kxhhZ2H+ML+EX/7X/6Ht3Llz5wQAAADAEZ/wewAAAABAK6FgAwAAAA6iYAMAAAAOomADAAAADqJgz+G+++5TW1ub2traND4+7vdwEEJ/+9vf9OM...
[ "neither; they are equal", "2/4", "4/8" ]
null
0
math
pre-k
spheres
true
false
Which shape is a sphere?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAACuCAYAAACvDDbuAAAYEUlEQVR4nO2dSXAb15nH/72jG01QBChxcRXpqpgaa5mDlhrZB8kXT02U5RCpKrkkuczBOWZydm7WNancRoecnKuXSspRpsaXUAcvpeUwIuWITpVIl7mIBCkAjQZ6fXN4fA2ABGk0NjaA96tSSQJJdBP966+/971NIISQTRf42gZKAeATcDiJQxaAMQlYMIApFRA2HUK+LJ70aXE4rXMtA8grNv3PjAr8S5pazeEkjVIA/KMMbLjAMxsQiz79ApeWk2TGJOooAFg...
0
science
grade-8
identify-rocks-and-minerals
false
true
Sandstone has the following properties: formed in layers found in nature not a pure substance not made by living things no fixed crystal structure solid Is sandstone a mineral or a rock?
"iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACtWK6eAACk0ElEQVR4nOz9aZNk15nfCf7OOXdffI0l9wRIgiyqpOrukVmbjbXNzLces5k382KsZ8bUi9TqVolVxEIAmRmrr3e/9yzz4ngEEiBISaYCAbDyMQsgPZYMT/f73PMs/0U45xwf4kN8iO8N+WM/gQ/xIX7K8SFBPsSH+DPxIUE+xIf4M/EhQT7Eh/gz8SFBPsSH+DPxIUE+xIf4M/EhQT7Eh/gz8SFBPsSH+DPxIUE+xIf4M/EhQT7Eh/gz8SFBPsSH+DPxIUE+xIf4M/E...
[ "mineral", "rock" ]
null
1
math
grade-1
purchases-do-you-have-enough-money
false
true
A pack of gum costs 49 cents. Do you have enough money to buy it?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAB3CAYAAAB2WzTHAABR0UlEQVR4nO3dd3hUZfYH8O+903t67wVCC72JgIgNEZAqKCoCigVdde24tmV/bnPdVde+zd3VXSsoCNJUROmQUJIAIY30Oplk+sw9vz/ijAypEwK4eD7Pk+eBO7eeuffOmXfee16BiAiMMcYYY4yxi4J4oXeAMcYYY4wx1nc4wWeMMcYYY+wi0ucJvtlNSP3CguHbWmB2c+8fxhhjjDHGzqegEvw1VW48W+DoMnH/qt6DEpuEnGYvbttvO+sdZIwxxhhjjPWcvKcz3n/...
[ "yes", "no" ]
null
0
math
grade-3
compare-area-and-perimeter-of-two-figures
true
false
Which figure has a greater perimeter?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAH0AAABdCAYAAACILGkTAAAKsklEQVR4nO2df0xT1x7AP+X39qCwRegQS0DhKZPFbe2DjW5LABf0GUNwJuJiIMuUzAx9sNlsY//AnHuRbKaYtz/I4gQzs7ksiD4XlsWXNF0e+z2LvuimBqqzKnvArvyoU6h9f/S1awcISsu9t/d+/tFyzu0918+9l/M953yPGo/H47l6E867YMQNEx5UIowYDSRFQ+69oIsDzdUbHs83w2I3S2W+KNRCzDmX90N6HCz9k/eOUIksRtzw0xhcuQlnXRA1POEtUIV...
1
math
grade-1
select-three-dimensional-shapes
true
false
Which shape is a rectangular prism?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAACuCAYAAACvDDbuAAAR6ElEQVR4nO3da3Bb5Z3H8e+RdCTZluSLfJMdNwTiBAJJyAUSh2FpaLcwlBBoO/uCDpcSBphu2V12O7xop1OYnS07IYRLl7a0mS1dygJbugN1gU3ZpelyS9JNHDvkYjuJgx1f4mtsybJulveFbMUKiWOSIx098v/zKpGOnvN38vOjc47+eo42MTEx0ROBI0Hwj0NsAiGyjk0DtxVq86HCDlpPeGJi94jZZQkxe2s8YGsNJv7is8PigkSqhcg2/nFoHoXuCLQEwTI...
2
math
grade-6
interpret-histograms
false
true
A business magazine surveyed its readers about their commute times. Are there fewer commutes that are 0-4 minutes or commutes that are 15-19 minutes?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEECAYAAAASx0PMAAAuAUlEQVR4nO3deVjU5cL/8Q+LbCoIigu4i7ijQllSmVJqbrmldjxanUotj2mnc7m0HI/l85zKx8ql8mdmi2ZmmuiBMrUSs8RU3FMJNxRBJRUwwXBgfn94MYmyfHE2ht6v63quh/nO3N/5zNzC+XB38x03s9lsFgAAAACbcHd2AAAAAKAqoWADAAAANkTBBlzEmjVrNG7cOG3evNlhz5mdna2JEyfqX//6lwoKCio8/tChQxo3bpwWLVpkh3S2MX/+fI0bN07Hjx93dhQ...
[ "15-19 minutes", "0-4 minutes" ]
null
1
math
kindergarten
represent-numbers-with-pictures-up-to-5
true
false
Which shows 2?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAOAAAADgCAYAAAAaLWrhAAAXPklEQVR4nO3dfWwc93ng8e/M7Oz7G7ncXVIS3yRKFCnJSqzIlnV2LMNuHNtpLufYKa4vSXo59OqgCA69IM0BTXI4ILhLg6KH4g6HtkCvTXpIkLQJ2vQluaR+SexUlqWokkhKFCW+LF/3jfv+/jL3x1qy1MhxgpD8WeTz+Ufmcne483i+S3JmdqhZlmWt1eFaGQotaFoIITaJTQOfAfvdELWDtlazrDN51U9LiJ3nfj/YZsqdD/rsMOrp1CmE2ByFFkyXYLUOV8u...
0
math
pre-k
represent-numbers-up-to-20
true
false
Which picture shows 5 squares?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAZYAAABcCAYAAABN/JPwAAACwElEQVR4nO3ZMU5UURTH4fMGmEJBG9RYaCda2bIKN+A6XIbrcAG6C0srESsbMVAxMgnI5Fq8kFgRwP974+D3NTOTSe49Z5pfXqZrrbWDs6qv86rZouq8FQBc2XpXtbVW9exO1aNpVXdw2trH42WPBcBtsHuvan1/3n94PK16frevDgBc1WxRtXdS9f2s6su8anJ83n8hKgDcxNZa35Cqqp+Lqsnijy8A4CYuGvKrVU2WOwoAt42wABAlLABECQsAUcICQJSwABA...
1
science
grade-4
identify-minerals-using-properties
true
false
Select the one substance that is not a mineral.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAANcAAAEYCAYAAADPtGNgAADOf0lEQVR4nOz9ybNs2ZXeB/52dxrvbvv66AOBABJIAJlMMjMlspSUSSpRUslMmpSVaqJZzeqPqlkNaqQBZUajlRkpkZKRFJNEDwSiff3tvD3d7jTY57j7ffECIJnxMh7Bu8I87n3ufr0966y1vvWtb4l/tojxwzFMFTd2Yzf272ArD7/cwJMOjjT87cN0vbxxrBu7sb+aTRV8OE6/r/3uennjWDd2Y391G/zIxt11+pt5Kf+hWXjhZ/yK+wkimhAhiq96nID40t8...
2
math
kindergarten
fewer-and-more-compare-by-matching
true
false
Which group has more?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAMwAAACGCAYAAACR4WX4AAAtWUlEQVR4nO29d2Cc1Z3u/znv9BlpRl2jXmzJtuRuGXcbU40xJdQkBEJCkk3Z9svm7t0ke/duzy+7d7Obm7Yb0gNJANNhwXTbuMiW5CZLsiWr9zKa3t/33D/GyBgMQSDJOLyff6SZd94yz5nn9PM9Qkoph+PQEYaACkmJjo7OWYwC0g1QZYd8M4jhmJSH/Bf7sXR0PvyscYKxPZx6UWCGBY6Um3R0dFIEVDgVgqE4nA6D4k+mDuhm0dF5O+mGlDcAgioo6psO6Oj...
1
math
kindergarten
spheres
true
false
Which shape is a sphere?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJ8AAACfCAYAAADnGwvgAAASvklEQVR4nO2dX1Bb153Hv0dIQn+QhBFGGIixYxvWjg1xTMe4Wzt2nJl2kg3ZmU1mMmmah5046cvONNluH9rZ8STTyUu7cWb2Zb3xvpSm027ch3UmmW3H8R+ctnbXOAG264BxMFjGgJENCCEQks4+XOnecwUY3Yuu7hH3fDITX12de+5P4qdzzu/P+V1CKaVjCWBwDoimgCSFQGAIdgL4yoAdHiDkBMjYAqV/njFbLIHV2O8H7DfmpBebnECzV9JMgcAIoimgPwb...
2
math
pre-k
represent-numbers-with-shapes-up-to-5
true
false
Which group has 2 circles?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAARwAAAEcCAYAAAAV9AvgAAAMQUlEQVR4nO3d309T9x/H8VeBIlApU/m1KRvDfL9fCcaYOKN3GlAj6m5I8Mo7E/2rNMZwpTEkLBFxkBgvjC7EeKFRv/uGIUxpBWSltlZa7PeC4Db5Nl+gp+/P4fT5uGEGe877E9onZ6f1nFA+n8/HlqT/pKXkspTLCwA8URWS6iulf9RJLdVSKPYxn/9l0fVYAILuSFSq+jW98oevq6V/RVZqBABeSC5LL1PSzJL077RUsZhb+QaxAeC1+sqVtkjS+2WpYvkv3wA...
1
math
pre-k
more
true
false
Which group has more?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAMwAAACGCAYAAACR4WX4AAAysklEQVR4nO29WXAcZ7qm92Rm5VI7ClVFrMTCDSQIUlwkkVooat+lltTd6u5zfI7HMWGHIxxhR9g3vvGtfTcTnom5sY9nzpn2nO6WrFZ3a99Jrdw3cAO4YC8sVQWg9sqsyvx9kQBISlR3Q01AVJ98IhSgsrIqs96/3j//9fskIYSYsuByGQo21AUeHh4L+CQIK7AxAE0aSFOmEEfy3/dteXjc/uyJgO9S2f2fFg16gq6bPDw8XAo2DJRg0oLBMsj5uvuCZxYPj28...
1
math
grade-3
parallel-sides-in-quadrilaterals
false
true
How many pairs of opposite sides are parallel?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAD8CAYAAABNcdMMAAAm10lEQVR4nO3deXxU9b3/8fdMJpNkMiQhAUIgYU0QCuKGBauibAGv1oVfBQEjeLW2yr22oLW1LLUqtbWK1V7Ui1LAEEC0qK1UZFGxeoWKW4WCYRMChDUkIXsmM78/Qr9ZXNhm5szyev51PkeS+fhQHr59c/I9Np/P5xMAAAAAv7BbvQAAAAAQSQjYAAAAgB8RsAEAAAA/ImADAAAAfkTABgAAAPyIgA0AAAD4EQEbAAAA8CMCNgLqT/96XZe9fKdKa49bvQoAAEBQ2Hj...
[ "2 pairs", "no pairs", "1 pair" ]
null
2
science
grade-3
identify-vertebrates-and-invertebrates
true
false
Select the invertebrate. Hint: Insects, spiders, and worms are invertebrates.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK8AAADMCAYAAAAF8vOBAADa5klEQVR4nOz9eZBlWX7fh33OOXd9e+5ZlbUvXdXVe3X39DqNng0zWGbAAQkIkEhAlGiH7CAthyU6wgoqHLZkWxEOhRUhh0lT4iIwCJBYCGAwAGYwS89Mz/T09FrV3bXvWZVZuefLt9/lnOM/7r3vvayuHjTU/EOO4InIqsz37nKW3/n9vr/1iDd3rD1Rhqri37V/1/4X2doaLnXhbgwTDrzYyD6X/45w/137X3qrKjhRzn7v6NHn8t8R7r9r///QCjpN7Ogz534...
0
science
grade-8
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.
"iVBORw0KGgoAAAANSUhEUgAAAfEAAACtCAYAAACgCUZFAAAz8UlEQVR4nO3dd3hUVfrA8e+UzEwy6SSEhEAChFAVKSIIKE1BRImiiKK4FgTbunbXdRVX3RV1FXRdFBEbisoiLCAqYkFhqaFEOoFQQnpvM8m03x/8iCItk9yZeyd5P8+TB2a495z3cif3nXPuOefqPB6PByGEEEIEHL3aAQghhBCicSSJCyFEE2zbtg2dTnfSj8lkomvXrjzxxBNUVVV5Vd51113HyJEjvY5j165dXH311cTGxhIbG8vYsWPZsWOH1+WIwGJUOwAhhGg...
[ "The magnitude of the magnetic force is the same in both pairs.", "The magnitude of the magnetic force is smaller in Pair 2.", "The magnitude of the magnetic force is smaller in Pair 1." ]
null
2
math
grade-6
compare-checking-accounts
false
true
The table shows checking account features and fees for two banks in Fort Bradstone. Estelle is a retired Navy veteran who wants to open a new checking account. She wants to link her account to a digital wallet to pay for things more easily. Estelle plans to use a nonbank ATM near her apartment 2 times per month. Which ...
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEOCAYAAACzXGCqAACnJElEQVR4nOzdeZxN9f/A8dfd7525s48ZhsHIvu+RLCFrKCJLJClFkYpvtqSFSMu3nyVpL2RLWUZo40sSRYkiRpZhzL7eO3f//XHM5ZoZM8Mwlvfz8ZhHOcvnfM6595z7Pp/z/nyOyuPxeBBC3PAODTlZ1lUQQlyBqNdCOf18allXQwhRCtRlXQEhxJWT4FoIIYS4fkiALYQQQgghRCmSAFsIIYQQQohSJAG2EEIIIYQQpUgCbCGEEEIIIUqRBNhCCCGEEEKUIgmwhRB...
[ "Greenview Bank", "East Island Bank" ]
null
1
math
kindergarten
count-sides-and-corners
true
false
Which shape has 5 corners?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAGoklEQVR4nO2dS0+bRxSGjw1kkZB21yo/oO26K35X/0rTKCzCiqyQkg1sYRkpKGukNF2QVfkQN9lgZOz5posP0nAxvs2cOZf3kSLFMcYT9MSx53vPvK0YYzy4IvqnR9QNRMNIAMzNYovo+QLRL0+Jfn5C1Drox7jbKb0sYJmVH4gWv/SaGy+eEP32rLEQgHnpBqLPF0T/XhH93SNqd4bNHZAMpOT5QuMUEdF5IGqH7+4AICU3Tg0iUbvsUoAXIBpgAaIBFiAaYAG...
1
math
pre-k
squares
true
false
Which shape is a square?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAADzElEQVR4nO3aTVIUQRBA4TczwMLfneIB1CN4DM/KNbyBP3vHLSgRImO7aFBUFIbpzqrKem/VHdWRkYsvelWLYRiG9Rl8OIWTDZwPmO3c3gIeruD5PXh6AIv112F4c1x6Lcvcq0ew9/50fHl2AC/vjwrNdu1kA2+/wMczeHcKy+Pz8UBkNmUPV6MpgM8bWG6uHJhN2aWpbwMsy65ivSQ0C0loFpLQLCShWUhCs5CEZiEJzUISmoUkNAtJaBaS0CwkoVlIQrOQhGY...
1
math
pre-k
one-less-with-pictures-up-to-10
true
true
Count the triangles in this group. Which group has one less than the group you counted?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAFACAYAAACGDgu2AAAPlElEQVR4nO3dz24UZxbG4eMoCauRkm0uYmYVFLickLmNSGQzQSJzEVxIdgE0u7HZTWhYsQ2SyVi07a5ZDEhwsD//O1X1VffzbIFW+YjF290/yXvDMAwBAACU+GzuBwAAgG1iYAMAQCEDGwAAChnYAABQyMAGAIBCBjYAABQysAEAoJCBDQAAhQxsAAAoZGADAEAhAxsAAAoZ2AAAUMjABgCAQgY2AAAUMrABAKCQgQ0AAIUMbAAAKGRgAwBAIQMbAAAKGdgAAFDIwAY...
null
[ "iVBORw0KGgoAAAANSUhEUgAABDAAAAFYCAYAAAClCwyGAAAXc0lEQVR4nO3dz25c93kG4I+JLAFpE7iA0aLeFUWaZVdN4vQafBGxkjvoNkYUILAFS7mH+BLqfXeRg+5CapPaGnqlpqiBGKEkQvwzpwuahfyJPBzyzMz5fuc8z4YL29LRG2YgvvO95E5EdAEAAKxF13Xxp6OIz19EHJxGnPjbNsCN3NqJ+O63I77/nYi/ux2xEwoMAABYmz+97OI//zL2UwBMy4++F3Fr7IcAAIAp+ezF2ce/vx3xg786e/cQgOs7OI344/OI/z6...
0
math
algebra-1
identify-linear-and-exponential-functions-from-tables
false
true
Is this function linear or exponential?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEqCAYAAAAvYSeKAAAXLUlEQVR4nO3df5CW5b3f8Q/sygYEV1EQInJY0IgaUShICkdJK8GqQ+dEi4IExVFAnehkJlNgEqGMwQmTEH9F1DEDRnc0Ro2QmDBI1Go30kVPPRhpFLSAJEZdgRjBExUW+ocJLdXGXb2Wx11erxn/2Guf+7q+/vfmnvu5t9OCea/uSTtwyRVH5M7btlR6jBaZ9V8+X+kRAACokM6VHgAAADoSgQ0AAAUJbAAAKEhgAwBAQQIbAAAKEtgAAFCQwAYAgIIENgAAFCSwAQC...
[ "exponential", "linear" ]
null
1
math
grade-3
read-a-thermometer
false
true
What is the temperature?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEOCAYAAACzXGCqAAAbK0lEQVR4nO3db2wb+Z3f8Y9k2dnofNHgoMvFQE8en584xab+2SmaAHXAEQrsPui1Igv0UZCKLLAFiqIl2TwKigOHd2j3QXGg2KIoUAMnqmie9AlH/fMgAVoOL86DpDjtLJLDugVyO1baGkjV9qfEVbyWLfWBIMY0vbsm+RNJed6vR5rvDGe+fvbxF7/5zdzx8fGxAAAAADgxP+0GAAAAgNfJwjQemqap0jRVHMd9dd/35fu+giCYRlsAAADA2OYmtUQkSRJtbW0piiI...
[ "20°F", "10°F", "15°F", "40°F" ]
null
0
math
grade-3
identify-multiplication-expressions-for-arrays
false
true
Which expression describes this array?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAFUCAYAAAAeSUs7AAAiz0lEQVR4nO3dP2xV5/nA8SdRJXuwhTcTGMyEmWBICBsUBlAHYKNDIpZEFUxNh9AJBtKlydC0CxnaDigZyoY70SEt2YiTgU52pniAms3IHczk33B0Ff0ScJ97znv+XN/PZ0okzjlvvop0Ht577rmv7e7u7gYAAFDE630vAAAA9hMDNgAAFGTABgCAggzYAABQkAEbAAAK+llnV9r45od/npmLOHhsf1+3Ca3ytMrTCgA60d6AvbEa8XglYnM94tn6y//MgUMRB5cjls9...
[ "3×4", "5×3", "5×4" ]
null
2
math
pre-k
addition-sentences-up-to-10-what-does-the-model-show
false
true
Which addition sentence does the picture show?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABUCAYAAAC4PkCPAAAP90lEQVR4nO3dTWwc533H8d+87fuStCnJlCiKql8ku67rxjJg++D4UMApnAB2ESPILQYCJLfm2ENR2EWBOj22QIIcUxRIT8mpKJAAcVE4dlygsOvGbmPLb7JJ6o0UKS53Z3dndp4elpQoiaJFcuaZffl+AAMhsZzn/9MAmT+enfmPY4wxAgAAAJAKN+8CAAAAgFFCgw0AAACkiAYbAAAASBENNgAAAJAiGmwAAAAgRTTYAAAAQIposAEAAIAU0WADAAAAKaLBBgAAAFJ...
[ "3+1=4", "5+1=6" ]
null
1
math
kindergarten
curved-parts
true
false
Which shape has a curved part?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAJnElEQVR4nO2dS2xdRxnH/85LbUkDhJYqZYEqRJEqgZBYZMWeBV10jdQNqhQJBALEAlWom4LaCgEVbUNFEzbQpKAqwU78yMtNYzux41f8juM48U1s37ft43uv7+OcOyyuLKVRoLbvzHzfzPl+G8eyfc5f5/4yc+bMnPlalFIqWQXmSsB6BIQKgtA0e1qAJ3cD33wCeGYf0JKsKDUQUMcSfObwAWDPrVLjm0P7gG99oWGhIDTLegTcLALLVWC2BOwKwsYPRDJBJ0/...
0
math
kindergarten
hexagons
true
false
Which shape is a hexagon?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAJgklEQVR4nO3cXWhUZx4G8OfMZCZjMsmYTOYrcZrVJNZKjVdSWHBvtgRZ18LqUtxKWEGkbCvdRZGlhLKsspRWKLttobRScJEWWbYurFiqeLEg7EVlL4ziV6JpjMlMJpmkk0ziZDIzZy/G053VqFHP+Z+PeX53EjzndebJec857/OqqKqqJvPA4DwwWwQKKoieWY0CNLiBrjog4gWU5IKqfjtj9rDIyV5qBGoG5st/iHmB5+vLKSR6VrNF4PockMgDN+YB10yh/AO...
0
math
pre-k
flat-and-solid-shapes
false
true
Is this shape flat or solid?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACmCAYAAADgZPidAAADkUlEQVR4nO3aoQ0CQRRFUZYgqAGDozUSCiKhNRyGGnBDCay4mwVyjv7iyZvJTGOMsQEAABLbtQcAAMA/EdgAABAS2AAAEBLYAAAQEtgAABAS2AAAEBLYAAAQEtgAABAS2AAAENrNPbw9LkvuAL7A+XhdewIA/Dwv2AAAEBLYAAAQEtgAABAS2AAAEBLYAAAQEtgAABAS2AAAEBLYAAAQEtgAABAS2AAAEBLYAAAQEtgAABAS2AAAEBLYAAAQEtgAABAS2AAAEBLYAAA...
[ "solid", "flat" ]
null
1
math
grade-2
skip-counting-stories
false
true
Each coat rack has 5 jackets. How many jackets are on 4 coat racks?
"iVBORw0KGgoAAAANSUhEUgAAAVcAAACnCAYAAACl1B+1AAAk7klEQVR4nO3dd1gU5xbA4d9SRaqAYgeDJWisFNFYsCe2aOyJxthyTexeE70WFHuMSRA1xF5ij70iRIVoIhJ7R4UANlQUQaSIsPePlRUEFWSXFTzv8/C4OzM7c3Y9e+bbb8qnCFNGKBHiLdd9RW8ANvVbo+NIhHi97it6o6frIIQQoigqkOJ6I1GPpvvN6XDQjPhURUFsUoh8kZwV+ZXv4up/2xCfy8avTMCAW4bcSNTjYpw+350wye8mhcgXyVlREPJVXKedNeHr4OL...
[ "20", "14", "4", "30" ]
null
0
math
kindergarten
subtraction-sentences-up-to-5-what-does-the-model-show
false
true
Which subtraction sentence does the picture show?
"iVBORw0KGgoAAAANSUhEUgAAAMgAAAAyCAYAAAAZUZThAAAOtUlEQVR4nO2dW3Ab13nHf7tYXAiKF10okbo5kkgrtiNZkmckcyI5didNUie1nYmVpmPPEM6kHsUPyfgtad+ddKYPdtrJ9KHTsI3kZBorcepJldoey43VUpZsihZ1sUSRFi8iKV5AAASI2+45fVgCILALECB1ISD8ZjQUdvccnD/5/85+e87ZXUVKKalSpYot6t1uQJUqK5lqgFSpUoBqgFSpUoBqgJQJV699drebYGEpbSo3HdodbEeVJdJ57DhdZ7pp378P33Pfutv...
[ "4 − 1 = 3", "3 − 2 = 1", "4 − 2 = 2", "4 − 3 = 1" ]
null
2
math
grade-2
select-figures-with-a-given-area
true
false
Which shape has an area of 8 square units? The shapes are made of unit squares.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAKQAAAD+CAYAAAC0oK7QAAAEWklEQVR4nO3dMY5VdRiH4e/OAAWCdhoWICyBxGikkR3pItyRWgiRWLADwB5sGSABmRyLC4nWc2bOO5fn6SZT/A/Jm6+bH7tlWZYX72b+ejNzcjrzfhm4MFd2MzePZ76+PvPVtZndi7fL8vjl1p8FM3c/n7ny7M3+h1vXZu58tq8VLsrJ6cyT1zPP3808fTNz9PL9/hdiZAs3j/ftzcy8Op05Ov3PL2ALH9v7Z5k52vZT4P8ESYogSREkKYIkRZCkCJIUQZIiSFI...
1
math
grade-3
am-or-pm
false
true
The sun is bright, so Brittany puts on her sunglasses. The clock shows: What time is it?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEJCAYAAACuWVASAABRaUlEQVR4nO3de3RU9b03/veePbdcZpIQwi3hrkKiBcSWBK3YnxroEetzFqGtVE97oLXaZ5UGTwGfqlAF7fMoeITqWlZRaB89iBU8Z3nEaqJtn7RIYi0CLROwEG4TIARIsnOb696/P4YMGTKX70zmmrxfa7nI7PnOzLfJ7M5nvvvz/XwkTdM0EBERERFRXOhSPQEiIiIioqGEATYRERERURwxwCYiIiIiiiMG2EREREREccQAm4iIiIgojvSpngClAa8GeDVol//1/yx...
[ "12:55 A.M.", "12:55 P.M." ]
null
1
math
grade-2
names-and-values-of-all-coins
false
true
Which coin is this?
"iVBORw0KGgoAAAANSUhEUgAAAKsAAACrCAYAAAAZ6GwZAABiJUlEQVR4nO19XUhbabf/b8rBCMEYEwQ/YnDCKKGOMR1QhLSgGEo6rRehpTpvy7RwpvJKKWUYpjTQi14UIh2GQYYi2DlQh/aMliletD31XyIWbKAonMb4pgR9iTkxfoAYt5GA8UL/F5m1fPbOjtqv6cfMglI1yc7ez157PWv91m+t9cnW1hb+lpeXzc3NrX379n1CPwOAJEnQ6/WQJInfl0ql+GetVgu9Xg/63N/ycvIf7/oEPgTZ3NzcIgVMJBJYWFjA2toaCgoKtgB...
[ "dollar coin", "quarter", "dime", "nickel" ]
null
3
math
grade-1
select-two-dimensional-shapes
true
false
Which shape is a rectangle?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAE/ElEQVR4nO3bvVIcVxCG4d5dIJAlO7NLmRPbl6Bb0kXZpUAORKIiUZEoIFEgAidE8jryGsMiWcKLFmqB2eNgGBeWjfmZnjPdfd4nEoWCCd6a5u8bpJTS/qnIL8ciR5XIeRKgtZWByIORyDf3RL5aExnsL1LanvX9WIjs0eciK+Pj+oOHayLffVZXCLR1VIm8mYvsnYr8fCwynJ3XnyAyaHowqpsSEflYiQyrS58ANDVNnSWRYb+PglIQGrIgNGRBaMiC0JAFoSE...
1
math
pre-k
addition-sentences-up-to-10-what-does-the-model-show
false
true
Which addition sentence does the picture show?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABUCAYAAAC4PkCPAAAQF0lEQVR4nO3dW2wc12HG8W9m9sZdrkSLF4ukaMq2LMWCLSGVCkNGLRUoIj9Eho3GgPMUpEHrNG/xSwEDbZO0Rf3Son2J0aJFL4CBtg8OUCRokABJitqW+xDbcWW3tiTLsi7UxVxdSO5tdi59WJGiJIrSijNnhjv/H2BYWi3nnM8wtN+emTljhWEYCgAAAEAk7KQnAAAAAPQTCjYAAAAQIQo2AAAAECEKNgAAABAhCjYAAAAQIQo2AAAAECEKNgAAABAhCjYAAAAQIQo...
[ "4+2=6", "5+3=8" ]
null
0
math
grade-3
division-input-output-tables-find-the-rule
false
true
What is the rule for this input/output table?
"iVBORw0KGgoAAAANSUhEUgAAAMkAAABtCAYAAAALS0X9AAAMWklEQVR4nO3de1BUZ57G8e8h3F1oQAVkNLKIrEYQjIGURMHRxGRhExejTKIDFRSyxhhv2SqzU+Ml8TJJDJso2Ti6m1QSTeI2btAdSMpsSLxgSJU3sg4II+MFdBENNwVsGrrP/qFQy2LmqBBPn+7fp6qr6NOnTz1d3Q+n34b3bcVsNqsIIX6SO8C3IRv1ziFu+mX9b+T5cCC/rP8NbnqHEMLRSUmE0CAlEUKDlEQIDVISITRISYTQICURQoO73gHuRHTQZBZF5wGw4vA...
[ "÷ 2", "÷ 1", "÷ 4", "÷ 3" ]
null
0
math
grade-6
identify-complementary-supplementary-vertical-adjacent-and-congruent-angles
false
true
Which angle is supplementary to \angle{2}?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADgCAYAAAA5ZRHsAAAw0UlEQVR4nO3df1RU953/8ScSiFFOmFZtqtMW3JSDriBMlSXbrQzaHnOS2COeY5rsMQkgKJaQCA2a+itCUDdRGsc0iiEqsDHb5Ks9jJs0Huk2GSGbI9VkoOhRd9LNsCnaVtkM6ZBV2IHvH6wUFRVk4A7wepyTc8Jw7+e+5hz/ePOe93w+QZ2dnZ2IiIiIiIhfjDE6wI3Ex8fjdruNjiEiIiIi0i8BW2CbTCbi4uJYvXq10VFERERERPosYAvsiRMn8sUXX7Bt2zYWLVq...
[ "\\angle{5}", "\\angle{4}", "\\angle{6}", "\\angle{3}" ]
null
0
math
pre-k
rectangles
true
false
Which shape is a rectangle?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAE9UlEQVR4nO3dPWtbZxjG8Ut+G1KnpUtL9759A3+zbjEBL16yZMvQoYVCh0KHQodAoRk6OJMnoyhKIE5bq3FdgRTLLzrnPB1OThSDHUvW0X2el/9vM46Jhz+WbktcbjnnXO9c6o6kYS5lTsDcVlrS7WXpi1vSp2tSq3fm3ONB098WYrbxobTydFR+8Nma9NUHZYXAvIa59ORYOjiXOiNpaZCVnyAy1On2ctmUJL3OpaX8nU8AdaqaGjtpqdlvBakgNJggNJggNJg...
1
math
grade-6
mean-median-mode-and-range-find-the-missing-number
false
true
Jayla has the following data: If the mean is 14, which number could q be?
"iVBORw0KGgoAAAANSUhEUgAAAboAAAAkCAYAAAD/7P8CAAAJtElEQVR4nO3de1SUdR7H8ffMcL8IgoCiIKKYSgpJKoiX0lrLLiiabWXZamlnbbtutq3uabfdcq221q5uabfdY6apeSmXkMpQ0FAhMwNMTJFdEVSQyzAwM8/+QbCN4RHrmfk9cr6v/57f85z5fs75fTk/nsvMY9I0TQOwa800ORpxag5AQwghhLj4mDCbLPhZAvAy+bSOaJqm2RwN2JxWxeGEEEII/fiaA/C1BGB2aC2yyAkhhOhybM5G7FoLZpujUXUWIYQQwi2aHY2...
[ "25", "13" ]
null
1
math
grade-7
transversals-of-parallel-lines-name-angle-pairs
false
true
\line{PR} and \line{SU} are parallel lines. Which angles are alternate interior angles?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAD2CAYAAADs6vBqAAAkt0lEQVR4nO3df1TW9f3/8cfFT4lMmJHGphckbqQyWSUrZIEereZgQ8faskT0zO1kHTDOVq2zqe2crdN+hLgf7kcrkjZrMmWL3MqFF4Xu7EIKIREnCJd1XNqWmKIRcF3fP/rAV+YFIteP93Vd7/vtHM/J9wuv1/P1PP3x8OXrer0tLpfLJRPq7u6WJMXFxRlaR7CifwAAAO6FGV2AUSoqKlRRUWF0GUGL/gEAALhnMesOdlJSkiwWizo7O40uJSjRPwAAAPdMuYNdXV0...
[ "\\angle{UTQ} and \\angle{RQO}", "\\angle{UTQ} and \\angle{PQT}", "\\angle{UTQ} and \\angle{PQO}", "\\angle{UTQ} and \\angle{STV}" ]
null
1
math
precalculus
determine-continuity-on-an-interval-using-graphs
false
true
Is the function f(x) continuous on the open interval ( – 6,3)?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH/CAYAAABtkqoWAAB1vklEQVR4nO3de3xU9Z0//teZa+4XkpCEYMIdDSSBQIAAEawWrVQrWAtt1Vptd+3NbXfbXddad1sttdva/mrVdtvVqtVdK9/iDYyIcjUQAgECCQghQC6E3DPJXM9lzvn9kSYlcsvA+TCZ5PV8PFofGea88s45M595z2c+c45kGIYBIiIiIiIyhSXcBRARERERjSRssImIiIiITMQGm4iIiIjIRGywiWiQzZs3Y8KECVi+fDkA4LbbbsMbb7xx3vuqqooFCxagvLz8apZ...
[ "yes", "no" ]
null
1
math
algebra-1
domain-and-range-of-absolute-value-functions-graphs
false
true
What is the domain of this function?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH8CAYAAADrBti4AABlPklEQVR4nO39f3yU9Z3v/z8nM5PfIQkJJDGaICJYkKAoUhD8sVh11dJCf2D76Q973O26p649PZ/Pnm/P3rY9u3vz4+n3bNu9bY/t9rjtqdrPfj9d3apbsYFiRaFQiUYIJChihECA/Bjya35f8+P6/hEnTSTADFxvJpM87v9ohrmeeeW6Zq7rNde85hqXbdu2AAAAADgiL9sFAAAAANMJDTYAAADgIBpsAAAAwEE02AAmqK+v1+7du8d+PnLkiObMmaOurq4sVgUAQO6...
[ "all real numbers", "$\\{x \\mid x>0\\}$", "$\\{x \\mid x \\leq 0\\}$", "$\\{x \\mid x \\geq 3\\}$" ]
null
0
math
algebra-1
perimeter-and-area-changes-in-scale
false
true
Look at this circle: If the radius is tripled, then which of the following statements about its area will be true?
"iVBORw0KGgoAAAANSUhEUgAAACoAAAAUCAYAAAD7s6+GAAAB6klEQVR4nO2WMUgbYRiGnz8kS5vBxCNEcoTTgg6RgIHSaDsYSkvbHGgIOAlCCwFpl4CCbbroINQMXXTIJpUOQsbYoRDroKFiC0G0lBSqUISAUG3jdTg4roMQOGqN4oEIeeD4j4/v/XjuG45fmLumyRXAcdkCZ6UpajdNUbuxVVTXdTLZDEIRlL+U6/Xc2xztd9rxhD0MPR3i8PehJVcoFhCKYD4//9/ZTjtFI2qE7cq2pVb5XmH05ShjqTFGkiOEH4RRZIWZ5zP1HvW...
[ "The new area will be\n1\n4\nof the old area.", "The new area will be 27 times the old area.", "The new area will be 3 times the old area.", "The new area will be 9 times the old area." ]
null
3
science
grade-3
identify-solids-liquids-and-gases
true
false
Select the solid.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAKUAAADCCAYAAAAo2gI4AAAknElEQVR4nO2deZBcx33fP/3mvmf2PrGL+yAJgoRA0hZSImlKMlVSyi5bicplU3I55dhKrDh2xZHiqqhSTqUcH3JkSZSrYslSLFGiZce0RdqmKYqkBcYECRIgAZBYXIu975ndua/3On/07GKx2GN2d2b3AehP1dQCc3T3m/m+X3f/+te/Fm/MSbk/ACEHGs2WkjKhLwNjRYg54XhUPW9oQWq2i5AD9gfUv9Pm9ecNLUjNdjKvv5K8/pyxPU3RaFZGi1JjO7QoNbZ...
0
math
algebra-2
domain-and-range-of-radical-functions
false
true
What is the domain of this function?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH8CAYAAADrBti4AABwi0lEQVR4nO3deXxU5b0/8M+s2TeSkIRAwiZoIGETlE1RFK0LCtaLba3Va2u1bvX29l5vf92vP6+3rV2sWqu1LvfXe63eoq1gQBAEDEIkQiBhCwGyECbJJDOTWc8y5/z+wKREtplwHk4m+bxfL1++MpnzyZfnmTnznWfOnGPRdV0HEREREREZwmp2AUREREREQwkbbCIiIiIiA7HBJiIiIiIyEBtsIuqnuLgYW7du7fv5yJEjyM/PR1NTk4lVERERJQ422ETUT0VFBWp...
[ "$\\{x \\mid x \\leq 1\\}$", "$\\{x \\mid x \\leq-3\\}$", "$\\{x \\mid x \\leq-1\\}$", "$\\{x \\mid x \\leq 3\\}$" ]
null
2
math
pre-k
count-sides
true
false
Which shape has 3 sides?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAACd0lEQVR4nO3UO25UQRBA0ZrxJ+CbgVgAEBGzBTbCqtgIayAl4pNjUhssYTx6BE9I5HjuCHNO1K2WShVc9WZZluXsaubz5czFbuZ6Gfhrx5uZ+0czT+/MPD6d2Zz9WJZ354dei9vs5YOZ40+X6+XJ6czzu2uF8LcudjMfvs98uZr5eDmzPb9eH0TGTbp/tDY1M/NtN7Pd/fEAN+l3Uz+Xme1hV+F/ITQSQiMhNBJCIyE0EkIjITQSQiMhNBJCIyE0EkIjITQSQiM...
1
math
grade-4
acute-right-obtuse-and-straight-angles
false
true
Is this angle acute, right, obtuse, or straight?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABzCAYAAACil3UBAAAIkklEQVR4nO3dP2yc5R3A8d8RX5IG/4ntBCoCKoIiJekAbSGRKiSQigfaSrSwMDCARBdQMzZVuqBOmemfiTVjYOtiU4SoWgiCrZgOlTLYVoh95zjI57MvztvBubMdG7Dbu/fBTz4fycrr8yl57CxfPfr5eSpFURQBAAB0xV2pFwAAADkR2AAA0EUCGwAAukhgAwBAF/Xt9I3Xr7diYmImJsan49Spo/HyK4/0cl0AALAnfW1gT0014tKl2ZgYn46JiZnO69PTiwIbAAC...
[ "obtuse", "right", "acute", "straight" ]
null
1
math
grade-8
identify-functions-graphs
true
false
Which of these relations is a function?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAATIAAAE3CAYAAAApC812AAAciUlEQVR4nO3dfXAT54EG8Gclf8gStoQx2AR6PjhcdKnnEGcK9rlNjg4zV1M+ak8aQkmT0EkuySSXXiiEAjaOa0P58CR3FDflZtoQrgmkpNQHNGQmXDP8kbPNxIfaEEacM8ROPWMbCJZsLMuypL0/ZGsRyCaApN139fz+CVqj3de2eLKfzyvJsiz3+oFPvcBgEAjIICLStDQJyDYCRWYgPwOQekdk+eyA2sMiIro7S3KAtA5v+MXMDGC+JZxyRERaNhgELg4BPX7...
0
science
grade-3
identify-minerals-using-properties
true
false
Select the one substance that is not a mineral.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAANcAAAEYCAYAAADPtGNgAABbn0lEQVR4nO19ebQlRZnnLyIy8963FwVVFBTYgMgqzVJAQSODWErbrB4R2wOKzuDoIHSjPePY00pjHzlKy4jaCthqS+OCOnrGpZtmsR1ksZVFKQELiq3AgqIWanvbvTczI775IzIil5t587533633CvJX51XmzTUyM7749i/YgzuJDh0CRgQqVKgwC0xIYO0U8JIP7OEAb1ikt/OKsCpU6A0jAjh0SK9Pyng7rwirQoXeYegooHibk3dgy1cdL0REHff3CiJZflD...
0
math
grade-7
apply-addition-and-subtraction-rules
false
true
The number line shows two unknown numbers, s and t. Is s–t positive or negative?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAApCAYAAAAPgl6QAAAIj0lEQVR4nO3dW2wU1wHG8W/W7K7xFccXMBcbEYIoQjIQYy4F4qpVGopQMaVV6AOhQnUB0dxeeKiiEgXRoD4EqlCBCgmhgiJQTCUiqqh5wNBW9oJtXFzshAZsE24Gkjj4truw04ddL1gYTMp6z17+v6fZ8Vr65PGMP589c8aybdsWEMcOHDggy7K0cuVK01EQJRzz5MMxBxBPRpgOADypS5cumY6AKOOYJx+OOYB48tgF2+/3q66uTrW1tSooKGAUAYiwQLetm1Wd8rb...
[ "negative", "positive" ]
null
0
math
grade-8
identify-functions-graphs
true
false
Which of these relations is a function?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAATIAAAE3CAYAAAApC812AAAYSUlEQVR4nO3dbWxb9aHH8Z+TOHbskISHPDDYkmxwG5roNlXaPIyrinSatNB2W5nWTnvXakxMWl/txXgxMTTGRKVpmkTZNCG1bPfNKk2o3KYqElKDJqQ8QG4NS0rKBnZhu6TOoOmDHduJ4/vCPU6cOGkefGz/ne/nDY1Tjg+hfPn//+f4/B2JRCIxGZP+EZZuxqW5hACgoJU5pLtKpYc9Un255JiMJhIjN/J9WgCwMV1VUtnfw8kv7i+XtnmTlQOAQnYzLl0OSZ/...
3
science
grade-3
identify-materials-in-objects
false
true
Which material is this statue made of?
"iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACtWK6eAABlEElEQVR4nO39abSlWXrXB/723u9wpjvEjRuRGVk5VlaVqjSURAkWWMK02ww2yAIjCTAtCcwy9mrb0PTqXsvYy3Z3r/7AB1gCm16yZdzYpmWBaIlGRsiFkISsqVQqSUXNlVmZGZkxj3c80zvsoT88e7/nnBtDVkqqzIi451kr4g7n3HPec85+9n6G//P/w9rWtra1rW1ta1vb2ta2trWtbW1rW9va1ra2ta3tMTb1Xl/AV2shhAL4TuAZILzHlyP2kKsIgFv6QQMhBMC...
[ "asphalt", "rock" ]
null
1
math
grade-1
estimate-to-the-nearest-ten
false
true
How many marbles are there? Estimate.
"iVBORw0KGgoAAAANSUhEUgAAAiYAAAFvCAYAAAB+cQB/AAEAAElEQVR4nOz9e5BlV5XfiX/2ua/MrMx6ZkFVSaoHDSo9UGGgaAZoCxA2SB3TTfeAe8JgPI+Y/rnnj/HYdMQvhnHjP36eaPinmbDnD3DLHY7oBscMjZpu8DTi0RQPSbahJGFJqB6SVS9VllBl1iszb957z9l7/f5Ye++zz82bVZlZmVVZRS4CnTr33rz3nLP3Xuu7vmvttYyICOuyLuuyLuuyLuuyLmtAspt9AeuyLuuyLuuyLuuyLkHqN/sC1mVd1mVd1mX1RNo97Ok...
[ "about 70", "about 20" ]
null
0
math
grade-6
quadrants
true
true
Which shape is in Quadrant III?
"iVBORw0KGgoAAAANSUhEUgAAAfkAAAH8CAYAAADSe9ZXAAA4MklEQVR4nO3de3BT94H+/0eysLGNb2DANgHnxiUBhwQSwiWmoYRdErLkyi/DpJdMsp2lMx0yu9nOZNlup5tp2HS+37QJTbJbdjOhu822E4ZstxRSCiHg4BJqCGCMIUAaY2JsbGPZlpElWdL5/UHlLwYbS8ZHR+fwfs10pjqWznn4RDrPuenIZRiGIQAA4DhuqwMAAABzUPIAADgUJQ8AgENR8gAAOBQlD0C//OUvVVlZ2fs4HA7rhz/8ofx+v4WpAFwrSh5wuA0bNmj...
null
[ "iVBORw0KGgoAAAANSUhEUgAAApcAAAH8CAYAAACEt4SVAAA+CUlEQVR4nO3df3AT94H//5dk2cY2/gUGbBNwfvEjAYcEEsIv03CEO/LjyE++GSb9kUmuc+lMj8xdrjO5XK7TyzRcOvdJm9A0bbnLhN41114Y0l4ppDSEgGMXqCGAMeZnijExNrbxLxlZkrXS9w9iF2MbS2bXqxXPx0yHai2tXn13Jb303tWuKxKJRAQAABKOy+WyOwKuQW67AwAAACBxUC4BAABgGsolAAAATEO5BAAAgGkolwD0i1/8QuXl5b23Q6GQvvvd78r...
1
science
grade-8
identify-rocks-and-minerals
false
true
Dolerite has the following properties: not a pure substance coarse-grained texture found in nature solid not made by living things no fixed crystal structure Is dolerite a mineral or a rock?
"iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACtWK6eAACyKklEQVR4nOz9+ZPj95nnB75w30DiRgLI+76qsu6bLB4SKXEo9cx0z7RiZrrdMRt2/+YNh+3YiI3wrnfDEf4PZsKeHtuj1mhGalGUREmUeBfrPjKz8r4zkUAmkIn7voH94YvvR+R0m902Ram9kU8Eg6xiViWQ+D6fz3O8D0W73W5zGqdxGn9jKH/fL+A0TuPvc5wmyGmcxhfEaYKcxml8QZwmyGmcxhfEaYKcxml8QZwmyGmcxhfEaYKcxml8QZwmyGmcxhfEaYKcxml...
[ "mineral", "rock" ]
null
1
math
grade-1
addition-sentences-using-number-lines-sums-up-to-20
false
true
Which addition sentence does this model show?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABhCAYAAADsidaRAAAXFElEQVR4nO3de1BU590H8O9yc4PcFURSBKEDXkLAS8RLEsVUE3NTE6WayUTSGFPTjq12HGNMJxppNU2T6hszmVhnQq3B8VYwJuXVd0wAp8hFBI06atSA4IJxwSUs95V9/zg9CwsIu8thzzm7388Ms8vZzfr7ZVnOl+c85zkas9lsBhERERERScJD7gKIiIiIiFwJAzaRAnxyEdDuAZ79X7krGRz2oSyu0gcRkdp4yV0AkaurbQZGaAHvPv6cNbQDr+UC/3cL8PF0dmX...
[ "5+7=12", "5+6=11", "5+4=9", "4+4=8" ]
null
2
math
grade-8
transversals-of-parallel-lines-name-angle-pairs
false
true
\line{IK} and \line{LN} are parallel lines. Which angles are corresponding angles?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAD2CAYAAADs6vBqAAAdxUlEQVR4nO3df1BVBf7/8ddBJB0rkB0qyQmkUJZEQSDKUH64rLWbJbO1Wzrjj9ktx+wHqU1b0w/U2d+Ut21rppoIG7NZ2R0pmymWEBQmf3ERuGWkiZf1zrQrLT+2VfPn/fzhl/sV+aHE4R7uPc/HDDPeey6e93n/9fLt+5xreL1er2yos7NTkhQREWFpHYGK/gEAAPQtxOoCrFJSUqKSkhKrywhY9A8AAKBvhl0n2LGxsTIMQ4cPH7a6lIBE/wAAAPpmywl2WVmZWlt...
[ "\\angle{KJH} and \\angle{NMO}", "\\angle{KJH} and \\angle{IJH}", "\\angle{KJH} and \\angle{NMJ}", "\\angle{KJH} and \\angle{IJM}" ]
null
2
math
grade-7
nets-of-three-dimensional-figures
true
true
Which net will make this figure?
"iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAYAAABw4pVUAAAQN0lEQVR4nO2dfVjUZbrHPzMM7whCvCoshAgIAiq0oLLZrqbWVSodrTYtdVU8a1c5qCUnLcfLzqa1IWznmPGS5Eva1XpC103N9ahthGnkoMaCvDQKhCAvw/vbML/zBzJHTGFmGGGA+VwXf8DMcz83853n+T33fT/P7ycSBEHAhNEgHmwHTPTEJIiRYRLEyDAJYmSYBDEyTIIYGSZBjAyTIAbgwIEDzJo1ixMnTvTfmGBCb65evSpER0cLgAAInp6e/bZpEkQPampqhDV...
null
[ "iVBORw0KGgoAAAANSUhEUgAAAUkAAADlCAYAAADeIwWJAAArPUlEQVR4nO3de1yUdfr/8dcwnEQ5eQBREFQUFRBYLXVtq9081Lam9tvSVkvN1HW/fRNcS0pTXMtDW4qrHVQs87Bi+20Tq03TdnVXyTVbQcEVURsVD4wHEJTzzPz+GCE8IQMzc98zcz0fDx88RLjnEuTtPfP5XNdHA5gQqmEymbhQBcfLoNQANfLdEcKu3DXgq4VuPhDsCRokJFXlQqWJ/SVKVyGEAOjnB+5KFyFull9mfhviCVEtzf+jCSHsp9QAedfhfBUcKwM...
1
science
grade-4
animal-adaptations-beaks-mouths-and-necks
true
true
Little bitterns live near wetlands and marshes. A large part of their diet is fish. The shape of the little bittern's beak is adapted to catch fish. Which bird's beak is also adapted to catch fish?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAEKCAYAAABnkCFsAAEAAElEQVR4nOydd9wcVb3/36fMzO4+/UmDkIQSCEWE0FEkCogCItdCt1EEFWkiKNyrcDGKKE1BBMRCtVy8AqJyqUo1BAJEQJASOoH0PGV3Z+aU3x9ndpMnjYcQQfnt5/V6Xsnuzs6cOXNm9nu+5/P9fIT33htjcM7RQgsttNBCCy200EILLfx7QkqJ1hqR57lvBfcttNBCCy200EILLbTw7w8pJbIV3LfQQgsttNBCCy200MI7A8455NvdiBZaaKGFFlpooYUWWmhhzaE...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA88AAAEKCAYAAAAsMWftAAEAAElEQVR4nOy9ebxtV1Xl/51zrb33Ofe+NnlpSQIkECA0IoRGwGiItEJKytCKVTSCEgUUaS1BARvK0BWIgFAIBLuiSkAQi4D8lCYgEEKkk76RNCR5/bv3nL3XWnP+/lj7nuSlIQ+IotQZn8/73HfP2WfvdXZ391hzzDHE3T3njJmxxBJLLLHEEkssscQSS/zHhKoSY0REftBDWWKJH0rokjgvscQSSyyxxBJLLLHEf3yYGTnnH/Qwlljihxa6JM5LLLHEEkssscQ...
0
science
grade-5
use-evidence-to-classify-mammals-birds-fish-reptiles-and-amphibians
true
false
Birds are a group of animals with similar traits. The following traits can be used to identify birds: They have feathers. They have wings. They have a beak. They make eggs with shells. Observe the animals and read the descriptions. Select the one animal that has all of the bird traits listed above. Burmese pythons hatc...
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAp8AAACmCAYAAACcAuREAAEAAElEQVR4nOz9V7Rl6V3fe39nDiuHvXbOu3btyqm7q3NSq9Vq5YgEyEKADRg4GIwN+Bz7YBtssA04gAkGLEAgIZCQ1MpqdVbnqurKeee0cl4zz3ku9F643nFuT/cYZn7u5s0e62L+xv6N/zOf5xFea0fR3gSkJGKxWCwWi8Visf9PdAO42geh40dRXDxjsVgsFovFYv9f6wYgRFEUvdU/JBaLxWKxWCz294P8vz784W//MRsbV+l36mzuriBrGh/+0D9G1Uyunj/...
1
math
algebra-1
identify-direct-variation-and-inverse-variation
true
false
Which table shows inverse variation?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAdwAAAA/CAYAAABKBHltAAAN70lEQVR4nO3ce1RU9d7H8fcYEoWCIDcztKNy0XRFRxRlBV46shAQRU8oqXW8pIkp6h8CWtpKvIQZaSqmHY9IiYZysBDKkxeUFi0vqOCF6eHxEo8hIuAFVG4zzx888Qgqsmo7mxm+r7Xmj9nstX+fxW/t+cy+jSbcJ1WPEEIIIZ4qM4BPk0arnaPFFoTtZcMR48nb1s32lfkyJjJfxkXmy7i0UzuAEEII0RZI4QohhBAGIIUrhBBCGIAUrhBCCGEAUrhCCCGEAUj...
1
math
algebra-1
identify-functions-vertical-line-test
true
false
Which of these relations is a function?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAATIAAAE3CAYAAAApC812AAAZDUlEQVR4nO3dXWyb12GH8T+pL0qMbcWuKOdT1prUWqjN8mxLMooFVoBuVSyncIDGBYYAi9AACWDfDWuv1CxuinjIhgGV6xXY4rS9qYMiMGYVDpbODIoNkpgYZhfKlbuglJ0BlsglluRSIqkP7uI1KVKiZMkW+fKQz+9GIiWRb6T4wTnv13Ekk8nkeEL6dEa6vSDNJwUARa3SIW2pkJ6skxqrJcd4PJn0T9u9WQBwbzq2SpX/M2M9eKha2u22KgcAxez2gnQtKt1...
1
math
grade-4
measure-angles-with-a-protractor
false
true
Is this angle acute, right, or obtuse?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEVCAYAAADaTZLyAADxeklEQVR4nOyddVhUaf/GPzNDd3crAmJ3d3d3r73l5u/td9/aN7Z3XWPt7u7uQkUEFQHp7m5m5vfHgaOYoLjq+nyuyws5+ZxhGO7zPfdzfxVarVaLQCB4Lfniiy/44osvXvUwBAKBQCAQ1AKFENgCwetJTEwMnp6eREdH4+Hh8aqHIxAIBAKBoIYoX/UABALB45k7d261rwKBQCAQCN4MRAVbIHgNycnJwdHRkZKSEgwMDEhOTsbCwuJVD0sgEAgEAkENEBVsgeA1ZPf...
[ "right", "acute", "obtuse" ]
null
1
math
pre-k
addition-sentences-up-to-10-which-model-matches
true
false
Which shows 4+2=6?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAUQAAABKCAYAAADDly0CAAAMd0lEQVR4nO3dSYwcVx3H8e+rpfd2ZzzeEo+xx04MBhsLCzAckAJycsslEIkDERe4BBQpl3DjiCJxAgQSIHHhEOXABQQSKCiCG7uSkASwk7FxbDwe9yQzvVV1LY9Ddc/myUxXT1UvNf+PNBrbXf2qflb1v6tevaqntNb6TheutaERgK8RQoh9wVJQNeGREhzNgbrjav3n1XFvlhBCjNflA2BdbUd/eTAHHy5H1VIIIfaDRgD/bsH/uvCfNhirfvSCFEMhxH5TNaP...
0
math
pre-k
count-sides-and-corners
true
false
Which shape has 3 sides?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAC9klEQVR4nO3UuW4UQRSG0TvjJWDNjJBjloAYXorH8VM5JgBMamEIbbCE8agJWiAQoWf+7qo+J6pSSVc3+FSrYRiGi5uqT9dVV5uq26HgzvZXVQ/3qp7dq3pyWLW6+DEMp5dTr0XP3jyq2j+7Hi9PD6te3B8rhLu62lR9+F71+abq43XV+vJ2fBAZ2/Rwb2yqqurbpmq9+esBtul3Uz+HqvW0q7AUQiNCaEQIjQihESE0IoRGhNCIEBoRQiNCaEQIjQihESE0IoR...
2
science
grade-5
use-evidence-to-classify-animals
true
false
Bony fish are a group of animals with similar traits. The following traits can be used to identify bony fish: They have fins, not limbs. They live underwater. They have a skeleton made of cartilage. They make eggs with no shells. Observe the animals and read the descriptions. Select the one animal that has all of the b...
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAp8AAACmCAYAAACcAuREAAEAAElEQVR4nOz9ebRsd1nnj78+0967qs505yH3Zp5DQiADYIAwBU0YBBQiAoootiKIKAo2tLqQRpSm6QZtG7UBEaFZ4GIQGgSZgoRfCNAgESIxkPHmzmeqYe/9GZ7fH586JzlkwojQX7JfWXflnDpVe65dTz3D+62uXhY5bQCzho6Ojo6Ojo6Ojo5/F1Yj/PMI1EoQ6QLPjo6Ojo6Ojo6Of29WIygRkR/0hnR0dHR0dHR0dNw/sHf8Zf7MR6CUotcr2TQ7x1y/x9z...
0
math
pre-k
fewer-and-more-compare-by-counting
true
false
Which group has fewer?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAOAAAADgCAYAAAAaLWrhAAADo0lEQVR4nO3WPW4dZRiG4ff4rwgJNBEI98ASsoqsx6Xl0ttJdpEdhFAbo6SyE0sxPhqKUSQ6S6Cjm3Cuq5kZTfNopFvfbJZlWa7vZ367m7ndzjwsA+zI0Wbm2eHMT09mfjiZ2Vx/XpY3N/Us2D8vvp05ene3Pvx4MvPLN2udwG7cbmfefpr5/X7m17uZg5uH9YX4YPeeHa6tzcx83M4cbP/2Ati9L639ucwctFNgvwkQQgKEkAAhJEAICRBCAoSQACEkQAgJEEI...
1
math
grade-5
identify-rhombuses
false
true
Is this quadrilateral a rhombus?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEPCAYAAAB4ALMPAAA2hklEQVR4nO3deXRcdX7n/U+VSqtLcmnfN0uyvOIFr+AFs5ml083SJOmZGBiGSacd8vDgyXTyzNAnZ5qH5mQ64STQaZKnJ92kB3IgbrAD3cZgsPAu7/KKFy3Wvm+l0l7L84fpa7uxjJYqXanq/frrc6ukez/imKOvy/f+fhafz+cTAAAAAL+wml0AAAAACCYM2AAAAIAfMWADAAAAfsSADQAAAPgRAzYAAADgRwzYAAAAgB8xYAMAAAB+ZDO7wHhVdzfoWx/9d4Vbw/Q...
[ "no", "yes" ]
null
1
math
kindergarten
represent-numbers-with-pictures-up-to-3
true
false
Which shows 2?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAOAAAADgCAYAAAAaLWrhAAAVlklEQVR4nO3deXCc933f8ffz7H1jgcVJgCAIXiB4ieIhUqJkK5FUjSQn8cTxuG2SdsZ1+0cn4/RIk+mkSTx1pp1xp0mm7SSdaTyZpK09U3sSJY4sOZKsi/ctkiIB8AJAHItrF3tfz9M/YKqJ69gxCeAnAZ/XPwS4WOD5fWff+zy7zwJrua7rTlVhpAi5BtRdRGSFeC2IeWBrGNr9YE1VXPf0ounNEll/DsfBO1xc+qTTD9sjS3WKyMrINeBGASarMFQEe7G+dIH...
0
math
grade-3
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?
"iVBORw0KGgoAAAANSUhEUgAAASYAAADECAYAAAAyP4znAABkmUlEQVR4nO39eYBU5Z3vj7+eU9U7vUIhdAmNTSNLQEVAUZMm6gioma+CM6ImxCTXiUvme3MNk29wi2YGUCZ3NHdyx5hkYmKMwUQJtj/vKCYaBb1RliDasiirTXfTNL13LV11zvP8/njOOVXVC/RSvdDUO+OcPnVOnfOcOg/vz/J8FqGUUqSQQgopjCAYwz2AFFJIIYXOSBFTCimkMOKQIqYUUkhhxME73ANIIYUUBg+vv/46b731Fp999hnHjh2jurqa6upqMjIy8Pv...
[ "certain", "unlikely", "probable", "impossible" ]
null
2
engineer
grade-6
identify-control-and-experimental-groups
false
true
In this experiment, which were part of a control group? The passage below describes an experiment. Samuel noticed that he could make a dome of water on a penny if he added drops of water slowly enough. He wondered if adding soap to the water would allow him to fit more or less water on the penny. Samuel put equal-sized...
"iVBORw0KGgoAAAANSUhEUgAAAUwAAAEhCAYAAAAUBJnbAAEAAElEQVR4nOz92ZNk2X3nB37OOXf1JTz2yH2pzMqsDUChABIkCDbY6G6RTZFUj9Q2rdGY2kymh3mQbMzmZcZMf8OM5qXNxkwczbxptLTa1JKNutEjLuACkAQKVUBV1pJ7ZmRExuq7+13POfNw7r3hUSgsXEQUCvEzi7yR7h7u193P/Z7f8v19f+I/+U/+E8uZndmZndnPkP3n//l//lN5XQ/gn/2zf/ZTefEzO7MzO7O/rP2n/+l/+lN7bflTe+UzO7MzO7OfMTsDzDM...
[ "the pennies with pure water", "the pennies with soapy water" ]
null
0
science
grade-4
read-a-thermometer
false
true
Select the temperature shown by this thermometer.
"iVBORw0KGgoAAAANSUhEUgAAAQgAAAKGCAYAAAC2pAXKAACiRklEQVR4nO2deXxU1d3/P3cySWaykglLQgIC2UAggGwBlVVFRGuruLRYtbUu9eljq326+djaxV/bZ2nd2rq19dFitW4VBYRWEHCBsMkqkoQAEsIiSViSmZBlzu+Pyb25yzn3nrvMTLDn/ZLXNTPzPZ9zzj33+/2eczep+08/JL4bfwSBQPCvxzfv+z6++fVbUDlmNPV7X4LrIxAIziGEgxAIBEz8ya6AQCBIHk/89r9NvxcZhEAgYCIchEAgYCIchEAgYCIchEAgYCI...
[ "43°C", "113°C", "45°C" ]
null
2
math
pre-k
cubes
true
false
Which shape is a cube?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAACuCAYAAACvDDbuAAAWTUlEQVR4nO2dTXAbx5XH//ONjwFIAqREyinCVWtqbUm7VZZcG/sg+aKtWHFyWPuQS5zLHuTr5hzfkrOv0WFP9iUHabeSiuRUJQdTh01SFlW1pY9E8lYZrDIJmQAoAIMB5qNn9tDoIUBCIiXOYGaA/l0kQSTQmP7Pm9evX78n+L7v12zgaxPoEMD1weEkDlkAChKwlgNOqoBQs3z/r+24h8XhHJ3vFwH5sUn/saIC/5inquZwkkaHAH/vAts28MgExLZL/4OLlpN...
2
science
grade-6
predict-heat-flow-and-temperature-changes
true
false
Two solid blocks are heated to the temperatures shown. The blocks are placed so they touch. Which diagram shows the direction heat will flow?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAARwAAAC4CAYAAAAxDlOsAAAX2ElEQVR4nO3d6XMTZ54H8G+31Lpsyca3sY1tDDEGkwCGmBBgyGRqk8lRk0mWOTJJJlW72VdT+2L39e4fsP/B1lRN7W6ymZpJNpvAZEMSCEm4YWxujA9sfF/yJVl3H/uiLRlhAyKSu2X5+6miEoTUfqzu/vbz/Pp5JEHTNG0sCvQEAb8CyBqIiDLCKgBuC7DZBZTbAGEsomkXfWY3i4hyXasHsHYH9b9U2oDGPD2NiIgywa8AnQFgNAp0BQHRJ+v/wLAhokxzW/R...
0
math
grade-5
nets-of-three-dimensional-figures
true
true
Which figure will this net make?
"iVBORw0KGgoAAAANSUhEUgAAAM0AAACmCAYAAAB5jwvwAAAOV0lEQVR4nO3df1RUdd4H8PdMoxxxh3Q0rIQWSYVjDzvG6qKJgXqoIe3H09HKHk3yFxwoiV1sCTJEEdA0RcNgwZbUHtqW3efpkWQ20kBxcdJ4mNhtsRA5grWSjekkRkwz+0fLnIhBuHDn3jvwfv053Ln3M+fMm3vvfD/f71U5HA4HiKjf1HIXQORpNHIXIAaVSiV3CdRPGRkZePjhh6HX6+UuZcBUnn55xsB4ptjYWGRlZUGn08ldimBDJjQbn7fKXAn1ZeM2LQDARzs...
null
[ "iVBORw0KGgoAAAANSUhEUgAAAUkAAACmCAYAAABX731LAAAgmklEQVR4nO3deVxU9f7H8RdbKIogmUtuSIC4IIoaEhSoqWBZ2s8lyxQDc8utqy2aiam43NyLRFAntQvdsjRNuWoJBQmiCLiEokiKqaQIIigyMr8/CMokBZ2ZMwOf5z88wjPnfKYZ337POd/v55hoNBoNQogqMzExUboEoUemShcghBCGzFzpArRB/mU3HnPnzuXFF1/Ezc1N6VKEqBITYz/dloA0TmPHjiUkJAQ7OzulS6k2+c7VLjUmJIPfLlC4EnE/wUusAWh...
0
math
grade-7
bases-of-three-dimensional-figures
false
true
Look at this figure: What is the shape of its base?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAC+CAYAAAAP4XhrAAAeGElEQVR4nO3da3BUdb7u8aeTdDokMVwDJxuCCggWNyNCEHRQtjiMM0JNeUhtowk1WqQ83Kw5GwoOnilR0DkCbiU6ZwbYsylS7JEwmjooJGZrlBFQCBAdJaiMY6JcW0Q7RsKlQ7rPC6a7c2+SrO61uvv7qaJKOt1r/SjfPOn6r99j83q9XgEAAAAwRJzZAwAAAADRJMHsAczmcrl09OhR/fjjj7rvvvvMHgcAAAARLua/wZ47d65+8pOf6Oc//7m2bNli9jgAAACIcLZ...
[ "square", "octagon", "rectangle", "triangle" ]
null
3
science
grade-4
animal-adaptations-skins-and-body-coverings
true
true
Hermann's tortoises are adapted to protect themselves from a predator with sharp teeth. They have hard outer shells covering their bodies. A Hermann's tortoise can pull its head and legs into its shell when attacked. Which animal's body is better adapted for protection against a predator with sharp teeth?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAEKCAYAAABnkCFsAAEAAElEQVR4nOy9eZxcRdX//66qu/Qy3bNP9hCyTMgewr4TkCVhEWWTRVkUH0FEQRCiDyiCytewKDECoggYEA0PjyzCAyjKkgCBEAJhSci+J5NMMltPL/dW/f6o251MEsIEg6i//rxeA+nuu9StqnvvOac+53OEMcYEQYDWmjLKKKOMMsooo4wyyijj3xNSShzHQRQKBVM27ssoo4wyyiijjDLKKOPfH1JKZNm4L6OMMsooo4wyyiijjP8MaK2Rn3YjyiijjDLKKKOMMso...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA88AAAEKCAYAAAAsMWftAAEAAElEQVR4nOy9ebwlVXnu/11DDXs6U88TNN1NIzMyCaJErjIKhhgnnPVGf5HgAFcDaNQ4XE0Eh0BwuE5o0JiQyWg04hQHRFFEFBCQZu65+5w+wx6raq3fH6tWnTqnG2mwDSap5/Np6LPP3lWr1lq1u573fd7nFdZam6YpxhgqVKhQoUKFChUqVKjwXxNSSrTWCCEe76FUqPDfErIizhUqVKhQoUKFChUq/NeHMYY0TR/vYVSo8N8WsiLOFSpUqFChQoUKFSr890D...
0
math
grade-2
identify-the-fraction
false
true
What fraction of the shape is green?
"iVBORw0KGgoAAAANSUhEUgAAAQ0AAABkCAYAAACcnmUuAAAXGElEQVR4nO2dfVRU95nHv6MyMeEiCdaFkZcx4rQRaRGSrEAAk6ow2OZUV4FumzYGwqZnE0mVbLfBsxu0rWa7G2Nr2nN2idTdbF4ErW5SYDBoLENgfKlAwxB1UBlAB1RIgIuSieTuHzP3egeGYV7uzDD4fM7JOYa587uXP/j+7vN9Xn4yjuM4EARBOMkcfz+Ap7T1G3C0qwH/8+n/4catz7D2wQxsiM1CljLN349GEDMSWaC9aQyaWehMLdAYtWg0NaOH7bV7XRQTAbU...
[ "1/10", "1/9", "2/5", "1/4" ]
null
0
science
grade-3
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?
"iVBORw0KGgoAAAANSUhEUgAAAQQAAACgCAYAAADq8hJGAAAXPUlEQVR4nO3de3QcZ3nH8e87M7ta3WXZsixf48S3ECdOnMQmQAklEAoplBQ4lEtDCBAI7aEBwiXlFsIdGih3DpDQBgI9PYU0lECBcggQB+Lg+BI5thPbiRzLN0nWdXe1OzPv2z/e1UiyLl7ZkmYlPZ9zcuKdeWf2lWb1m5ln3p1RxhiDEEIATtwdEEKUDgkEIUREAkEIEZFAEEJEJBCEEBEJBCFERAJBCBGRQBBCRCQQhBARCQQhREQCQQgRkUAQQkQkEIQQEQkEIUT...
null
[ "iVBORw0KGgoAAAANSUhEUgAAAiAAAAC4CAYAAADaI1cbAAAivUlEQVR4nO3dd5wcZ53n8c9TVd2Tg0YajbIsW7IEFs4BA0cy4YA1iwm7RzhyXl5EA2b9Apu0gDl7gSUc+c5rwovXcqxJ+4I9jiiDZWxLtmxJlmRZskZhgmY0ebqr6rk/qidIE9Qj9VRV93zf/4y6usLT8zz6za+qfvW0ASwiIoC1lqM52DsE/QH4ig4iUiKegQYXNtRCWxYMSkBEpODoqGVrX9KtEJFKd1UjeEk3QkTSY89Q9HN5FjbWRWcrIiKl0B/A7kE4koN...
1
math
algebra-1
perimeter-area-and-volume-changes-in-scale
false
true
Look at this cube: If the side lengths are doubled, then which of the following statements about its volume will be true?
"iVBORw0KGgoAAAANSUhEUgAAABQAAAAOCAYAAAAvxDzwAAABSUlEQVR4nNWTr8rCcBSGn+nEPwsKZjEsDIt4A+aNHxbZFRjUGxAU24Jm72BgsxjFC7DJysBgMJis2hbmzheEFYXvY1i+F95w4JyHc3g5mogIX1Tum7AUOJvNKBQKlEql1GEYZgfe73dWqxVRFKVut9uZgDrA4/GgWq3+2tzv9+l0OhyPR06nE4PBgHK5zG6343a7sdlsQETEcRyxbVsajYY0m01ZLBbySa7rilJKkiSR8/ksuq6L7/siIuJ5nozHY9EBut0uhmGw3W6...
[ "The new volume will be 64 times the old volume.", "The new volume will be 4 times the old volume.", "The new volume will be 8 times the old volume.", "The new volume will be 2 times the old volume." ]
null
2
math
pre-k
count-sides
true
false
Which shape has 4 sides?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAGqUlEQVR4nO2dXU8bRxSGjyGgNiXtRaVWvajUm7Y/IT+gPxwEIRJISSS4CU0jlSvoxdp4/bF417vTiyUKIQZ77Zkzc855HylSwFgs8MjenX3PvD3nnLsuif6ZEo1qorkjADbmWY/oxTbR78+Jft4l6l3PnDvNYx8W0MzL74mefZi2H/yyS/Tnd62FAGzKqCa6mBBdlUR/T4m28nn7ACQDPnmx3TpFRDSuibbqew8A4JNPTlWOaCvuoQArQDTAAkQDLEA0wAJEAyx...
1
math
grade-1
identify-faces-of-three-dimensional-shapes
false
true
Does this shape have a triangle as a face?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAENCAYAAAA1yBIEAAA1SUlEQVR4nO3d6VeUd77v/c9Vw1UDBRQFIrMxiYlJTGcwGo0a45REk63R7gznbzjP7n/qfnI/u8/a6+zTu/v0Tu/dfTqtjUMSY4y2E4goVQw11zWcBxdVgEAELKjp/VorixUW4K8YFp/68R0M13VdAQAAAKgKX60PAAAAADQTAjYAAABQRQRsAAAAoIoI2AAAAEAVEbABAACAKiJgAwAAAFVEwAYAAACqiIANAAAAVFGg1geAZ2K8pP/v/00qk7bU0RnQy6+GNTxiamD...
[ "no", "yes" ]
null
1
math
pre-k
one-more-with-pictures-up-to-10
true
true
Count the tomatoes in this group. Which group has one more than the group you counted?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABmCAYAAADxjOYpAABAIklEQVR4nO3deZxcV33n/c+5tXXt1Uv1WtV7S+pu7YtlyQu7CcYmdmLAGJLwEGAgwAQGJgSTDDyQScIDgeSZQMI2mSQ2YBuCHQzYMcHY2mzJ2nuR1Pum3rv2qq7tnvmj1C211m6pN9nn/XqB7aq7nLpXv1d9dercc4SUUqIoiqIoiqIoyqLQVroBiqIoiqIoivJqogK2oiiKoiiKoiwiFbAVRVEURVEUZRGpgK0oiqIoiqIoi0gFbEVRFEVRFEVZRCpgK4qiKIqiKMo...
null
[ "iVBORw0KGgoAAAANSUhEUgAABOwAAAB+CAYAAACXpI7eAACAl0lEQVR4nOzdd3xcV5338c+90/uojPqMum0V9xY7TkgghCUQEnZDYIGt9PYsbKFtgYVdysID7D6UJcDDs5AAKQsJCZAQllTbiR13FdvqvWv6jKbd8/wxsmy5SrYljZPzfr3AsWbuvUdz9ZXP/d1zz1EAgSRJkiRJkiRJV4UQgtEkdMYgnIG07G1LkiRJknQRegUcOqi3QrEx+zUFWbCTJEmSJEmSpKtmNCHYF1rpVkiSJEmSdC3a7oQiI+hXuiGSJEmSJEmS9HL...
2
math
grade-3
select-fractions-equivalent-to-whole-numbers-using-models
false
true
Count the equal parts. What fraction does this picture show?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABkCAYAAAC8REciAAAdH0lEQVR4nO3dSYxt233X8e9euzldnVNVt+rW7V/jZ8fGdgwmsnAsY0RisGwCEkjOgAGEIBwJpIyCzIgxQgQkGCIhEANmiUHACBgExROILSty7PjZfvfdd7vqq06/u7UY7KrT1N6nunvq+iX8PtKTb9XZ3an/YP29/mv/l+ecc4iIiIiIyFKYn/UDiIiIiIj8aaIEW0RERERkiZRgi4iIiIgskRJsEREREZElUoItIiIiIrJESrBFRERERJZICbaIiIiIyBIpwRYRERE...
[ "9/9", "9/3", "3/9", "3/3" ]
null
1
math
grade-6
changes-in-mean-median-mode-and-range
false
true
Look at this set of 8 numbers: How would the mean change if the number 28 replaced the number 92 in the set?
"iVBORw0KGgoAAAANSUhEUgAAAT0AAAAkCAYAAAD7Ne16AAAJzUlEQVR4nO3deVSVdR7H8fe9FxC4yHIBEVE2kRDFbURlUbG0OpFOWZ2WmcrRHKeyzGqWmtM5rTZ/dOpkHa2pMy1jm7vJmFuaC4u4AQpeBRERBYRkE7hwl2f+QG9dQXmQ5+Eyc3+vc/zn9zz3Pl8/98eXZ7sPGkmSJACzzUazxYpNkpAQBEH436cBtBoNejcd7lptx5gkSVKLxUqr1erc6gRBEFTkpdPh7aZDa7ZJouEJgvB/r9VqxWyT0LZaLc6uRRAEoU+0Wi1oLTZ...
[ "increase", "decrease", "no change" ]
null
1
math
kindergarten
one-more-with-pictures-up-to-10
true
true
Count the ladybugs in this group. Which group has one more than the group you counted?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABmCAYAAADxjOYpAABL70lEQVR4nO3dZ3gc1b3H8e/MrrS9qfdiq7r3bkwzYGrAtBAI4RJSbgoJpNwUSCPJ5QZIIB1IgIQOJsZ0Y4p7b7It2SpW722bdrWr3Tn3xdqShSRCcYOcz/PkeeKpZ+fw4jdH/zlHEUIIJEmSJEmSJEk6LtRT3QBJkiRJkiRJ+jSRAVuSJEmSJEmSjiMZsCVJkiRJkiTpOJIBW5IkSZIkSZKOIxmwJUmSJEmSJOk4kgFbkiRJkiRJko4jGbAlSZIkSZIk6TiSAVuSJEm...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA1YAAAB+CAYAAAAnS4CtAABvGUlEQVR4nO3dd3Qc1d3/8ffMrqTtRb335i73BtgUA8aU0AOBlF9CypOQAglJHkoK6SEFUp4UCCSB0A2Y0IwBG/duS7Z6713bV9tmfn+sLFlIMhB3cl/n5Dja3Zm9O1fifL5779wrASqCIAiCIAiCIJwQqqrSHYR6H7gjEBZp+yNHK4FZA0UGSImNPiYhCitBEARBEARBOGG6Ayq7XKe7FcKpstgCybGgPd0NEQRBEARBEISPkjpf9N+0WCgxRkc2hI8WdwRqvNA...
2
math
grade-6
which-model-represents-the-ratio
true
false
Which model represents the ratio 3:9?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAp8AAABRCAYAAACUlc3lAAAMcUlEQVR4nO3da4xU5R3H8d/szN5h0Z2FhV2NoLDcKrJGULS1UQzVFrymtYl9oSa1qPHSxsY3tmmTpom1XqpVa22sNdF4aVHRGKqi1RIxoHIRgeUiorL3WWDvu8zs6YvNCgrL7px5zvOcPf1+3sCGc57zf/j9z/AfZncm5nme19gv7eqWOjJS2hMAAABgRCImjY9LM0qkygIp1tjneevaXZcFAACAqDu7TErs7B78YkqBNLN0cDIFAAAATOjISHVdUkO/tKNbymt...
0
math
kindergarten
times-of-everyday-events
true
false
Beth is warming up for a soccer game on Saturday morning. What time is it? Choose the more likely time.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAHQAAABzCAYAAABJnyafAAANzElEQVR4nO2deXBTxx3Hv5KtW0iWsSwZLHyCjYGYI+YwCYebkBByzBin04GSTgjTkIZkCiEJ05JyhGmTDjBNkwwkKW1JCKEh0CGhAXIAqQkhUDAG2xiDT3zIlmzL1mkdfv3D+MmKdb2nJ1uW32fG49237/fblb7affv27dvlEARBaO3AbQtgdAFOAiwjiFgOMCYGmCgGVHyAo+0hiIvdw10sFiaYIwNib1n6Ikl8IEvSpzbLyMHoAm6agRY7UGUBuN3OvgRWzJH...
1
science
grade-3
compare-temperatures-on-thermometers
true
false
Select the thermometer that shows the higher temperature.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAQIAAAECCAYAAAAVT9lQAABxqUlEQVR4nO2de1xb9f3/XyfJyeUEciGEFggF2gIt0AK1thYv1bbei5vT1X130ercd9rtu4u67ftzOp11OjfrNve1uotaN91s1V2kTq2lalUobS3QApWLBZpAWyAkAXJyObn8/gg55CQBckIgoeT5ePiwOeScHMg5r/P+vK+E1+v1nnUCnTQw4gZcXiRJkuQ8R0QAqUKggAIWiAHirMPrPTwc79NKkiRJvFirAEQdtO9FphgokvtUIkmSJOc3I26gzQqccQLtNCA...
0