TapPoll is a quiz and polling app for the iPad, iPhone and iPod Touch. It can be used by instructors in the classroom for live, instant feedback of student devices. Students can use the quiz feature to study when they set up their own study guides. Students can share quizzes with their peers — even setting up a group password to limit who can see it. Additionally, public quizzes are available for everyone to use with more quizzes being added all the time. You can even submit your user created quiz for inclusion in the public quiz list (upon approval).