Poll Everywhere for Instant Response

Poll Everywhere keeps getting better.  In the old days I used to hand out clickers to students so we could get instant feedback on a question.  But the clickers were inconsistent and often were broken.  So for the past few years we have been using Poll Everywhere which allows you to create formative quizzes with either multiple choice or free response answers.  It can be used on smartphones or laptops or both simultaneously.  The best part is that if you have a LCD, you can project the responses up on a screen so you and your students can instantly see what percentage of the class has mastered the content.  Here is a video explaining how to create and use the polls and above is a short overview.