The document summarizes a study on the effects of classroom performance systems (CPS or clickers) on student test scores in a 9th grade honors biology class. The study aimed to determine if CPS improved test scores, participation, clarification of misconceptions, and pacing of lessons compared to classes without CPS. Results found no significant difference in test scores but students reported CPS increased participation and helped clarify concepts. The teacher felt CPS allowed for better pacing and discussion, though some technical issues occurred. Limitations included small sample size and potential biases.