Last night I tried something out for the first time, and it worked so well I had to come and blog about it. Polleverywhere.com is a website that allows you to not only poll your students, but to embed the poll in PowerPoint and display the results in real time. Here is a sample poll so you can get the idea:
The one tricky part to this whole thing is that you have to remind the students to type the word "cast" then the number. If you don't type cast, it won't go through. So go ahead and try it out, it works great and is free for the first 30 responses (which is probably good for 75-100 students depending on how many text).
They also have a feature that allows students to text in questions, and those questions update in real time. I asked the teens last night who their favorite superhero was, and they gave all sorts of responses, including captain caveman and batman. Several students had fun just putting their own names or the names of their friends up there. For some reason I can't embed the poll here, or I'd show it to you, but it was great fun.
All in all, it's a very well done, easy to use site. I would highly recommend that you check it out.