Math classes almost always start with a "problem of the day." This would be a great way to do it!
Using Socrative, an app that shows real-time poll results for both multiple-choice and short-answer quizzes, he challenges his students at the end of class to answer specific questions in order to get a broad look at whether they understood the concepts discussed that day.
Schools and teachers definitely need training! Just telling us to start doing something new is going to backfire. I would love to use more technology in my class, but still need a little more guidance and ideas.