Classroom Aid - Radioactivity

Text at http://howfarawayisit.com/documents/

I have broken up The Atom video into segments that are more appropriate for classroom use. Each one is just a few minutes long and they do not have any music. That should make them advertising free as well. The full video is reconstructable via The Atom playlist.

There is also a segment on credits with websites and documents identified that can be used for further research by interested viewers: How Small Is It - 06 - Credits and Research.