Utah Education Network (UEN)
Utah Open Textbook: 3rd Grade Science
How do we interact with Earth? Scholars learn about the sun, Earth, moon, forces, gravity, and heat sources by reading a text and performing hands-on demonstrations. They also differentiate between living and non-living things using...
CK-12 Foundation
Ck 12: Fourth Grade Science
This customizable digital textbook covers topics related to fourth-grade science. It is Next Generation Science Standards (NGSS) aligned.
American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Gr Kerr Wavefront Program
A simulation that uses the Kerr metric to show the distribution of light photon trajectories when near a black hole that rotates. Accompanied by explanatory documentation.