Okay, so we tried Socrative, and I love the way it gives feedback immediately. As my students answered the questions, I could see their progress on my phone. Once they finished, I had it email me a report. I got the email almost immediately, and I was able to answer their questions about the class based on the report. In fact, we go so carried away with a Common Core discussion (based on one of the questions) that we never got back to how to use this in their classes. Next time...

On another note, I shared this idea with a colleague today, and she is going to try it with a multiple choice quiz. It will tell you immediately how many questions the student is missing as they answer them. It does not tell you in the immediate feedback which questions they are, but you can get a general idea of whether or not they are getting the concept immediately. I am curious to know what the report of a multiple choice test would look like, so if anyone out there knows, fill me in. Thanks!