Although a number of researchers have examined response pad systems (RPSs) in higher education, there has been very little research at the K-12 level. This paper investigated the impact of using an RPS in the learning of physics concepts in a secondary school in Singapore. Two classes (n = 35 students in each class) of secondary five students participated in this study. One of the classes used an RPS while the other did not. Both classes completed a pretest and a posttest which tested the students in the application of the physics concepts taught. Results suggested that the class that used an RPS performed better in the posttest compared to the class that did not use the system. In addition, we explored the teacher and students' perceptions of using the RPS.