By Alan Ticotsky. First experiment, then understand—that’s how these books work. First, students perform an activity or experiment and try to understand what it tells them about how the world works or how science is conducted. They then study a reproducible handout with a reading about the original discoverers and classic experiments underpinning the theories that apply to and explain the phenomena under investigation. Grades 5–8. Glossaries. Bibliographies. 8½" x 11". Twenty-five activities focus on topics such as classification, natural selection, cells and DNA, plants, and the human body. 140 pages.