NASA
Nasa: Imagine the Universe: The Sun
Site discusses the regions of the Sun's atmosphere such as the Photosphere, Chromosphere, and Corona. Provides sources for educators as well as additional links for students.
Geography 4 kids
Geography4 Kids: Radiant Energy From the Sun
An introduction to radiant energy that offers a look at the different types of radiation from the sun, the radiation that actually hits Earth, and how the Sun's age will affect the radiation absorbed by Earth. Also, view NASA videos...
CK-12 Foundation
Ck 12: Earth Science: Solar Energy on Earth Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key points about the energy we receive from the Sun. Includes a few questions to check for understanding.