Chemistry student? Like Chemistry? Like Tests? Just like stalking my blog for the awesome content? Well, I've got a great little deal. Take the practice Chem Test #4 (100 questions), score better than 85%, and I'll give you extra credit. Yep. Easy-peasy. :) Click on the picture to get started.
If you're in Biology class, the same deal applies--except you have take the second Biology Test and you have a different enrollment code.
NEW enrollment code... nose44
Good luck & have fun.