Many factors affect the power output of photovoltaic (PV) solar panels. Four lessons and activities provide young engineers with the background information they need to design, build, and test photovoltaic systems.

Dr. Shini Somara narrates a 46-video Crash Course Physics course based on the 2016 AP Physics I and II curriculum. Topics covered include linear, circular, rotational, simple harmonic, 2D motion, derivatives, integrals, vectors, Newton’s...

A long time ago, a galaxy formed that contained a solar system with eight planets—or nine depending on who is counting. A collection of 22 lessons has middle schoolers examine the Outer Planets of the solar system. They calculate the...

The geosphere, exosphere, hydrosphere, and atmosphere are Earth's four main spheres. Surprisingly, all of these spheres work together providing us with resources, weather, plants, climate, and a place to live. Here is a collection of...