The Wonder of Science
The Wonder of Science: 1 Ps4 2: Illumination and Darkness
This NSTA vetted source includes resources to allow students to make observations that prove objects in darkness need light to be illuminated. Included are assessment ideas, videos, examples, lesson plans, and photos of student work.
CK-12 Foundation
Ck 12: Earth Science: Igneous Rocks
[Free Registration/Login may be required to access all resource tools.] Presents igneous rocks, which form from magma, and the two types: dense, dark mafic and less dense, light felsic. Also covers Bowen's Reaction Series.
Texas A&M University
Peer Curricula: Story Time: Melvin Calvin
A biography of Melvin Calvin, the chemist who figured out how photosynthesis works. The emphasis of this biography is on his early life, the development of his interest in science, and his education.