That’s right! With Poll Everywhere, you can now collect data from students such as poll questions, test review questions, etc. Students can submit responses as text messages or through Twitter and the live results appear in your PowerPoint! Poll Everywhere provides free accounts for K-12 Teachers that can track up to 32 poll responses.
Check it out at http://www.polleverywhere.com/twitter-powerpoint-slides.
If you decide to use this in your classroom, let me know! I want to see it in action.