Learn about the historical foundations of contemporary psychology. Use the timeline to explore key events, publications, and perspectives that have shaped psychology from the late 19th century to the present.
Build as many different looking towers as is possible, each exactly four cubes high using two colors of Unifix® Cubes. Convince yourself and others that you have found all possible towers four cubes high and that you have no duplicates.
There are five processes that can change rocks over time. Pick the process that has changed each rock from one type to another and then identify the process that cycles each rock from magma to rock and back to magma.
You can find the areas of different polygons by dissecting the polygons and rearranging the pieces into a recognizable simpler shape. Cut a circle into wedges and fit them together to form a crude parallelogram.
Become a geography whiz as you learn how the United States was settled. Discover how the continent was irrevocably changed by European colonization, the events that caused the wholesale displacement and decimation of the land's original inhabitants, and how the 50 states came to be formed.
Test how much you know about major U.S geographic features, Indian tribes, states and regions, European colonists and territorial expansion. View your correct and incorrect answers, and print out your assessment.