The American Association for the Advancement of Science has just completed a 10 year study with 150 000 students. They developed a range of 600 science questions that test the fundamental understanding of key science topics. Each question has been researched with each distractor designed to identify misconceptions, and also includes statistics collected through their study.
Put these questions into TurningPoint2008 you can quickly and effortlessly diagnose your class misconceptions and helping you to differentiate your instruction.
You will need to register but for the effort you get a great reward.