The Physics Laboratory of the National Institute of Standards and Technology (NIST) provides A Walk Through Time, a site devoted to examining the question of how humans have measured time throughout history. In one...

Like many great institutions in Philadelphia, the Academy of Natural Sciences has a long and storied history. The Academy was started in 1812, and in no time at all, the members of this institution were making...

Created by Lang Moore and David Smith for the Connected Curriculum Project, this is a module to study the process of moving from rate-of-change information to cumulative change; to relate this process to area...

Created by Lang Moore and David Smith for the Connected Curriculum Project, the purpose of this module is to study the process of moving from rate-of-change information to cumulative change; to relate this process to...

This online exercise lets students practice vector addition. They choose the precision of the test by selecting a target size, then estimate the sum of the two vectors by dragging and dropping a third arrow. Points are...