It would be interesting to add more representations to Etoys, such as tally charts, rods, an abacus, tesselating shapes, liquids: to see if they help children become fluent in logarithms, polynomials, statistics, complex numbers .......... like fluid mechanics, statistical mechanics, Shrodinger's cat, cellular automata, developmental biology .....

The higher level representations above should not be added to Etoys but the primitives with which they can be created should all be there. See http://schoolgamemaker.rupert.id.au/samples3/ for examples of the kind of things referred to above. They would be very hard to create in Etoys because many of the primitives are missing. There are very few script trigger events, eg no collision triggers, and no bounce action to name but a few primitives which would make programming so much easier.

For the kinds of things you might want to be able to implement in Etoys see

http://curvebank.calstatela.edu/home/home.htm http://mathworld.wolfram.com/topics/AnimatedGIFs.html http://www.fi.uu.nl/wisweb/

Tony