Browse Interactives

Carbon Lab

Run this model of the carbon cycle to see how carbon circulates through the atmosphere, biosphere, oceans and the earth's crust. Explore ways that human input might change global outcomes in the future.

Discipline: Science
Audience: Student

Cast Your Vote!

Cast your vote and answer some questions on the accuracy, usefulness and impact of polls.

Discipline: Mathematics
Audience: Student

Cat-Traption

Play an animation that incorporates most types of energy transfers and conversions into a chain reaction. Then rerun the animation and answer questions to test your understanding of how energy can travel and change.

Discipline: Science
Audience: Student

Cause for Debate

Because the Constitution creates separate institutions that must share power, there will always be disputes over the basic principles. Check out some of the hot issues (term limits, electoral college, judicial review) that are in dispute even to this day.

Discipline: Social Studies and History
Audience: Student

Chairs, Stools, and Tennis Balls

Find out how many different combinations of four-legged chairs and three-legged stools you can have after covering each leg with one of 30 tennis balls to silence the chairs whenever they're moved.

Discipline: Mathematics
Audience: Student

Characters

Learn about the different types of characters in Cinderella, and determine which traits belong to the hero and villain.

Discipline: Literature
Audience: Student

Civics Exam

What is your citizenship I.Q.? See if you can pass this civics exam on American history, the Constitution and our political system.

Discipline: Social Studies and History
Audience: Student

Civil Liberties Recap: You Be the Judge

How well can you decide the balance of civil liberties? Review three case summaries as well as the laws and facts about each case and arguments, and then make a ruling.

Discipline: Social Studies and History
Audience: Student

Climax

Learn about climax and identify the event that signals the climax in the story Cinderella.

Discipline: Literature
Audience: Student

Colliding Cars

Try to predict what will happen in three different bumper car collisions. For each collision, you'll be shown two possible outcomes.

Discipline: Science
Audience: Student

Colored Shadows

Manipulate dual shadows and learn why different types of shadows are cast.

Discipline: Science
Audience: Student

Columbia River Basin

Manipulate GIS map data of the Columbia River basin. Explore the basin and the effects of dams on the salmon population.

Discipline: Social Studies and History
Audience: Student

Comparing Figurate Numbers

Investigate, make conjectures, and develop proofs about triangular and square numbers. Compare numbers whose corresponding figures have similar base lengths.

Discipline: Mathematics
Audience: Student

Comparing Representations

Statistical analysis allows us to organize data in different ways to draw out potential patterns in the variation. Review and compare data represented in a bar graph and accompanying tables depicting relative and cumulative frequency.

Discipline: Mathematics
Audience: Student

Comparing Slopes

Control the slope of lines passing through the origin (0, 0). Keep track of what changes when the slope becomes positive or negative, and when slope is larger or smaller than 1.

Discipline: Mathematics
Audience: Student

Conflict

Learn about a story's conflict, and then identify the character who is describing the conflict of "Cinderella."

Discipline: Literature
Audience: Student

Congruent Shapes

Find shapes that are congruent. Verify that they are congruent by making rotations, slides, and reflections.

Discipline: Mathematics
Audience: Student

Connecting Themes and Disciplines

Connect themes and content to teaching strategies and activities. Practice developing lesson ideas by listing new concepts you would teach and activities you would use to teach them.

Discipline: Social Studies and History
Audience: Teacher

Constant Area

Do figures with the same area have the same perimeter? Arrange and rearrange 12 square tiles on a grid, and then measure the perimeter of each shape you create.

Discipline: Mathematics
Audience: Student

Constructing Quadrilaterals

Use a "linkage strip" to to build quadrilaterals with different sets of lengths. Once you build a quadrilateral, see if you can deform it into a different quadrilateral with the same side lengths.

Discipline: Mathematics
Audience: Student