Postprint version. Published in American Journal of Physics, Volume 71, Issue 11, November 1, 2003, pages 1174-1177.
The definitive version is available at https://doi.org/10.1119/1.1590654.
Instructors who wish to implement an interactive lecture style, such as peer instruction, have the need to collect feedback from students in a lecture environment. We present a computer-controlled electronic circuit that allows for quick, rigorous, and accurate measurement and reporting of student feedback in the lecture environment.
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