I appreciate this is slightly off-site, but probably of interest.
When you and your middle grade students finally get fed up with teacher-
centered, textbook-oriented, student-passive physics, consider Tabletop
Physics. This unique, classroom-tested, 100% hands-on 80-investigation program
encourages students to learn directly from the investigations rather than
indirectly from CDs, textbooks, or lecture/demo.
Send me a snail-mail address and I'll be delighted to mail you complete
information -- including sample investigations -- no strings, no cost.
Qdurham at aol.com