The contents of the UNIX directory resulting from unzipping the .zip file provide a demonstration of a simple polling facililty that instructors can use in class any time that students have access to a web browser. This is a good way to have students work problems and see to what extent they are converging towards correct answers.
Unlike other polling facilities, this one is completely free without any restrictions on number of simultaneous users, etc. It also allows a feature most polling facilities do not in that it may be used for completely free-form answers, and the instructor can still show histograms of response data. (For complex responses, it may be desirable to specify formatting constraints so answers that are essentially the same are not treated as distinct.)
Greenberg, Ronald I.. Open Source Classroom Polling (Interactive Response) Facility. , , : , 2012. Retrieved from Loyola eCommons, Computer Science: Faculty Publications and Other Works,
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Unzip the .zip file and look at the directions in the README.txt file.