Practice locating the median for odd and even data sets. Consider the information you can glean from a set of data even if you only have Min, Med and Max.
This timeline gives a contextual view of major events from from Pre-Columbian America to 2005. Each period covers a unit in the America's History in the Making course.
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.
Draw arrows connecting the sources of energy to the receivers of energy. Remember that some sources of energy have more than one receiver and some receivers of energy have more than one source.
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.
Track tulip growth as the season changes from winter to spring. See how temperature, rainfall and sunshine affect growth and help scientists look for patterns of climate change.
The Tungurahua volcano in Ecuador has gone through a series of active and dormant periods. Follow the volcano's activity from 1773 to 2000, including a scene of an explosive eruption in 1999.
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.
A computer can perform random sampling and estimation faster than you can. Use the computer to help you estimate a penguin population from computer-selected random samples.