Science: What is photosynthesis?

This video discusses the questions, "What is photosynthesis?"  It is done using rap which I am not a big fan of, but its descriptions of photosynthesis and the visuals it uses are really good.

Subject:  Life Science
Grade Level:  7-12
Length:  3:21

Science: How small are atoms?

Bill Nye demonstrates how small atoms are in this educational film.  Your students will find it interesting to see that most of everything is actually empty space and that the nucleus of the atom and it electrons are really spread out.

Subject:  Physical Science
Grade Level:  4-8
Length:  6:37