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Your third grader will continue to build on basic math skills such as addition and subtraction, telling time, and counting money, but will also start to learn how to multiply, measure, and understand fractions. You can help your child master these skills simply by playing games in and around the house. Leave the flashc... |
Spiral galaxy NGC 4921 presently is estimated to be 320 million light years distant.
This image, taken by the Hubble Space Telescope, is being used to identify key stellar distance markers known as Cepheid variable stars.
The magnificent spiral NGC 4921 has been informally dubbed anemic because of its low rate of star ... |
Shingles (herpes zoster) is a painful, blistering skin rash. It is caused by the varicella-zoster virus. This is the virus that also causes chickenpox.
After you get chickenpox, the virus remains inactive (becomes dormant) in certain nerves in the body. Shingles occurs after the virus becomes active again in these nerv... |
Civil Rights Movement Teacher Resources
Find Civil Rights Movement educational ideas and activities
Showing 201 - 220 of 1,588 resources
Montgomery Bus Boycott
It's December 1, 1955, and a tired African American woman refuses to give up her seat for a white man on a bus in Montgomery. This woman is Rosa Parks. While sh... |
A natural disaster is a major adverse event resulting from natural processes of the Earth; examples include floods, volcanic eruptions, earthquakes, tsunamis, and other geologic processes. A natural disaster can cause loss of life or property damage, and typically leaves some economic damage in its wake, the severity o... |
How 3D works
How We See
The fact that our left eye and right eye see objects from different angles is the basis of 3D photography. If you try looking at an object through one eye and then the other, you will notice that it slightly changes position. However, with both eyes open, the two images that each eye observes se... |
Common Core Standards: ELA
- The Standard
- Teach With Shmoop
- Sample Assignments
- Aligned Resources
RL.9-10.9. Analyze how an author draws on and transforms source material in a specific work (e.g., how Shakespeare treats a theme or topic from Ovid or the Bible or how a later author draws on a play by Shakespeare).
... |
To calculate the area of a triangle you need to know its height. If this information is not given to you, you can easily calculate it based on what you do know! This article will teach you two different ways to find the height of a triangle, depending on what information you have been given.
Method 1 of 2: Using Base a... |
Earth's companion is so large and fascinating that geologists count the Moon as one of the solar system's "terrestrial planets." In fact, it was probably born from Earth, after a Mars-sized body collided with the proto-Earth, in a collision so violent that the Moon that coalesced from the leftover fragments was entirel... |
This session introduces the idea that there are different meanings of "more" and distinguishes between relative and absolute comparisons. To familiarize ourselves with the idea of equivalent ratios, we will use both additive and multiplicative methods to explore different ways of making similar figures. We will look at... |
The phylum Mollusca includes snails, clams, chitons, slugs, limpets, octopi, and squid. As mollusks develop from a fertilized egg to an adult, most pass through a larval stage called the trocophore. The trocophore is a ciliated, free-swimming stage. Mollusks also have a radula or file-like organ for feeding, a mantle t... |
LEWIS AND CLARK EXPEDITION
Ambrose, S.E. Undaunted Courage (Simon & Schuster, 1996).
United States citizens knew little about western North America when the Lewis and Clark Expedition set out in 1804. Twelve years earlier Captain Robert Gray, an American navigator, had sailed up the mouth of the great river he named th... |
Why are the stars in the Orion constellation different colors?
In this view of Orion you can see that the stars are different colors. The red star in the upper left is Betelgeuse (pronounced BET-ul-juice). The blue star in the lower right is Rigel. The fuzzy patch in the sword is the Orion nebula. The nebula will be di... |
Reading Skills Teacher Resources
Find Reading Skills educational ideas and activities
Showing 1 - 20 of 3,767 resources
Students practice their fluency skills. In this fluency lesson, students read aloud stories to their peers and they help to coach one another on their fluency, pronunciation, phrasing, and inflection.... |
© 2008 Zachary S Tseng B-3 - 1
A mass m is suspended at the end of a spring, its weight stretches the spring
by a length L to reach a static state (the equilibrium position of the system).
Let u(t) denote the displacement, as a function of time, of the mass relative
to its equilibrium position. Recall that the textbook... |
|Part of the Politics series|
|Basic forms of government|
A confederation (also known as confederacy or league) is a union of political units for common action in relation to other units. Usually created by treaty but often later adopting a common constitution, confederations tend to be established for dealing with cri... |
A painting by Rudolf Bohunek depicting a man and a barrel of whiskey entitled "Ould Irish Whiskey. This image was painted during the Prohibition Era around 1910. Learn more »
In the early twentieth century, Louisiana reluctantly became subject to the abolition, or prohibition, of alcoholic drinks as a result of the fed... |
Apollo Space Freighter (1963)
When first proposed in 1959, the spacecraft that would eventually become known as the Apollo Command and Service Module (CSM) was envisioned as a three-man Earth-orbital vehicle upgradable to lunar-orbital capability. On November 15, 1960, NASA awarded six-month feasibility study contracts... |
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Let's find out how we know our shapes!
Introduce or review geometric shapes such as circles, triangles, squares, rectangles, etc. with students. Hold a class discussion of the similarities and differences between the shapes. Have students use construction paper and Crayola® Construction Paper™ Crayons ... |
The Early Cases
The Supreme Court adopted its present law of affirmative action after an extended period of experimentation. In a series of plurality decisions, various justices and coalitions of justices toyed with a variety of legal standards to govern the use of racial classifications for the benefit of racial minor... |
You may have heard of the Richter scale used to study earthquakes. In 1935 Charles Richter developed a system to measure the magnitude --or amount of energy released--of an earthquake. Each whole number on the Richter scale indicates a tenfold increase in amplitude (greatness in size). Thus, a 7.5 earthquake on the Ric... |
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Collecting rocks and minerals is a fun way to learn about geology! Most kids are naturally inclined to pick up any "pretty" rock that they see, which provides a great learning opportunity. Start by keeping the interesting rocks you find on walks and hikes. You might want to wrap... |
You Decide: Should the American space program send a manned mission to Mars?
This educational guide focuses on whether or not the American Space Program should send a manned Mission to Mars. Students are invited to examine the arguments on both sides of the debate, developing critical thinking skills as they work throu... |
A healthy ear emits soft sounds in response to the sounds that travel in. Detectable with sensitive microphones, these otoacoustic emissions help doctors test newborns' hearing. A deaf ear doesn't produce these echoes.
New research involving the University of Michigan and Oregon Health and Science University shows that... |
(Phys.org)—Two teams working independently have succeeded in entangling a single electron spin with a single photon in a solid-state platform. Both teams describe their process and results in papers they've had published in the journal Nature. The two teams used laser pulses fired at quantum dots to entangle pairs of e... |
Oxidation and Reduction
Oxidation is the loss of electrons or loss of hydrogen and addition of oxygen.
Reduction is the gain of electrons or gain of hydrogen and loss of oxygen.
Redox refers to a reaction where both of these happens. Remember it with OIL RIG (Oxidation Is Loss, Reduction Is Gain)
The oxidation state of... |
Kids learn the appearance and value of pennies, count pennies, and write the number of cents for the pennies on this first grade math worksheet.
Counting quarters is simple once you learn how. Practice counting quarters with your child using this math worksheet.
Let's go shopping! In this math worksheet, your kid will ... |
Analyze Air Quality with Lichens
Lichens are composite organisms consisting of a fungus (the mycobiont) and a photosynthetic partner (the photobiont or phycobiont) growing together in a symbiotic relationship. The photobiont is usually either a green alga (commonly Trebouxia) or cyanobacterium (commonly Nostoc).
The mo... |
In living and past peoples, there is wide range of variability. Despite this variability, our bones
have features that can be clues to ancestry. Many of these features reflect evolutionary processes, including adaptation to the environment.
Bone cells retain "biogeographical" information that is found in our DNA. These... |
Oh no! The mayor finally finished building the city, but all the signs got mixed up! Can your child help him sort out the mess?
Help your second grader learn how to read a math table by using this math farm table to answer a set of questions.
Can your second grader make her own bar chart? Use this pretend survey of 38 ... |
Primary Sources and Research – 4
Students’ research will use the History Detective Form to examine artifacts and primarysource documents, making observations about them and generalizing about what theymight mean. And how they might be used by historians. The primary source documentsare authentic and come from the life ... |
Multiplying Decimals Teacher Resources
Find Multiplying Decimals educational ideas and activities
Showing 101 - 120 of 1,224 resources
Developing the Concept: Exponents and Powers of Ten
Here is an exponents lesson which invites learners to examine visual examples of multiplication and division using powers of 10. They... |
Fossil galaxy reveals clues to early universe
A tiny galaxy has given astronomers a glimpse of a time when the first bright objects in the universe formed, ending the dark ages that followed the birth of the universe.
Astronomers from Sweden, Spain and the Johns Hopkins University used NASA's Far Ultraviolet Spectrosco... |
The first printing press designed to use the newly invented Cherokee alphabet arrives at New Echota, Georgia.
The General Council of the Cherokee Nation had purchased the press with the goal of producing a Cherokee-language newspaper. The press itself, however, would have been useless had it not been for the extraordin... |
The conquest of Central America is primarily the story of the conquest of the Maya states in northern Central America (1551–1697). There were, however, other tribes further south. Rodrigo de Bastidas established Spain's claim to the isthmus of Panama. He sailied along the Darién coast (March 1501). Christopher Columbus... |
Nibbling by herbivores can have a greater impact on the width of tree rings than climate, new research has found. The study, published this week in the British Ecological Society's journal Functional Ecology, could help increase the accuracy of the tree ring record as a way of estimating past climatic conditions.
Many ... |
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