interactive physics

[Volker Dirr]

currently we use closed software for this (crocodile clips / crocodile physics). But maybe someone knows good free software.

looks like there will be a strong free mechanical interactive software soon (free use in schools, but still closed source). it's working fine. i am just not 100% sure how to use it in school best, because i think our pupils can and should do that always in real practice.
have a look at:
http://www.phunland.com/wiki/Home

[Silver]

http://phet.colorado.edu/index.php
this agood program for physics, and it's free,and I am cooperating with them.

[Volker Dirr]

Looks like crocodile clips is now free for home use (NOT for school). (compare http://www.crocodile-clips.com/ )
but i am still searching for an alternative software.

[Zsolt Udvari]

I didn't have time yet, but as I know and as I could see, it is a not so bad homepage
http://www.physicsclassroom.com/