PHET science simulations for students

PhET interactive simulations - Fun, interactive, research-based simulations of physical phenomena from the PhET project at the University of Colorado.

I found those simulations were good in today's eduction- thanks for university of Colorado. Most of them are intended for Upper and High school students and pre- graduate students. However, if you just spend your time in experimenting with it, I am sure you get something new. Phet interactive simulations create a virtual lab environment. It's just a feeling that to enter into a physics or chemistry lab in a college. You can do anything in your own lab. Nothing to fear. No more comments from teachers...
One more advantage is that, you only need a java powered web browser. You can browse through different lab environments. If you like PhET virtual lab, you can download it for offline usage. Linux(80MB), Windows(97MB) and Mac OS(85MB) installation supported.

Browse phet simulations
Download phet for offline usage.