The document discusses the use of personal response systems (PRS) like iClickers in classroom settings. It describes how PRS allow students to participate more actively in class and give educators instant feedback on student understanding. Surveys found that most students enjoyed using iClickers and felt it improved their learning. PRS can also help students with disabilities participate more fully. New web-based versions allow students to use devices they already own like phones or laptops. Educators have changed how they teach in response to PRS and seen benefits like increased test scores and participation in large classes.