While the article is based on elementary classrooms, it’s still a pretty good article; particularly with regard to the clickers and being able to recognize the students who don’t understand the concept. Remember sitting in the classroom as a kid and when you didn’t know the answer, you simply didn’t raise your hand? Or you prayed that you didn’t get called on randomly? The clicker system will help a teacher to know what percentage of students don’t understand and can opt to spend more time on that concept. And since the results can be submitted anonymously, then students are called out for not knowing the correct answer; yet everyone benefits from a review of the lesson.
Unfortunately, I think this practice still happens in college.