I just ran across a tool called "Flubaroo", which is a basically a program that piggybacks with Google spreadsheets and forms.  If you make a test or quiz on either of those programs, flubaroo corrects it for you if you take the test yourself and enter the correct answers.  Check it out at www.flubaroo.com.  I was thinking this would be a great way to reduce your paperwork, allow you to give more standardized testing type of questions/situations, and even differentiate quizzes you are giving to students.  Now I have to figure out how to make tests and quizzes using the google tools....