From MRL Wiki
SurveySays is a script that intercepts IR and RF signals from certain handheld remotes that are used to take quizzes, tests, and give other feedback in the classroom (Read as, you can see all the answers that your classmates are sending!). The IR version of the script uses mode2 from LIRC to get the “raw” signal, and does the processing from there.
Below is the specification for the older IR based remotes.
And here we have the specification for the newer RF based remotes.
The project aims to expand the original SurveySays to the newer RF remotes.