Gradebook reports are confusing
There should be an option in the gradebook report to display what percentage of the people who answered each question got it right instead of only what percentage of the total participants, whether or not they answered that particular question.
We can do this today actually! Our gradebook report will give the avg participation and grade for each student or poll, as well as collectively over all of the poll questions in the report. These numbers will be calculated only when a correct answer is set on the poll questions. And, our gradebook report will be available on most of our paid plans.
You can see some more details about our reports here: https://www.polleverywhere.com/guides/presenter/reporting#gradebook