A real time online class response system was used in class to quickly query student population’s grasp of concepts, engage class participation, check their attendance, and clarify any misconceptions. The biggest challenges for the instructor are time needed to learn the new system, creating effective concept questions, adequate coverage of course material, and ability to respond to instantaneous student feedback. Student challenges include increased confusion if inappropriate wording for the questions, and a negative reaction to the approach in general. Overall this is a highly flexible use of interactive technology for engaging students in any discipline during the class time.