Not just another SCIENCE site

This is a sight DEFINITELY to check out. You get badges (Awards) when you complete tasks. you can watch your points go up. You choose your Subjects. Here is what there mission statement says: Spongelab Interactive is a group of scientists, teachers, animators, artists, and programmers passionate about science education. We believe that cutting-edge technology and stunning interactive media should be available to everyone, regardless of fiscal constraints. 
http://www.spongelab.com/index.cfm