Classroom “clickers” quiz students in real time, allowing instructors to gauge student learning and reinforce what is being taught. New research suggests that the effectiveness of these devices hinges largely on the teaching methods being used with them, not the technology, and that instructors would do well to think about why they are using the devices and whether or not they dovetail with their teaching style.
https://www.theedadvocate.org/classroom-clickers-improve-learning-depends/