Balance Scales is part of a set of the ELVM (Etoys Library of Virtual Manipulatives) I am working on (feel free to add to the library by posting your projects on squeakland. The advantage of ELVM's over other Virtual Manipulatives is that being in Etoys the kids and teachers can not only play with them, but also:
- Use them in journal entries created in Etoys - Kids and Teachers can create their own versions of the EVLMs - Look inside and see how they work (just get the halo and look at the scripts)
Here is the video http://www.youtube.com/watch?v=MYzTXPkgVpU and here is the blog posthttp://mrstevesscience.blogspot.com/2010/10/etoys-minute-balance-scales.html which points to some lesson plans.
Thanks, Stephen
squeakland@lists.squeakfoundation.org