[Edu-sig] turtle in education

[roberto]

hello,
i am looking for materials, experiences etc. about using turtle module
in math, physics and related for middle or high school students

i realized a lot of work is going on but is there any place where all
or part of this material is gathered ?
i am going through the talk of Gregor Lingl at PyCon;

if you're aware of anything else just tell me

thank you very much
-- 
roberto