Hi Daniel,
I'm taking 8-15 yr. olds through Kim Rose's "Powerful Ideas" book (see the Squeakland site). They seem to like it. I'm taking the 11-15 yr.oldsdirectly to charting, after they master motion, since they need charting for a "project based learning" health project.
I have some 5-7 yr. olds whom I'm just letting paint with Squeak. I'll see what they can do, but I'll introduce concepts gradually.
Cheers, Darius
squeakland@lists.squeakfoundation.org