Added a note (wording is kind of clunky so I'm happy to consider suggestions): Because some students may submit a response but not complete peer assessments, some responses may not receive the required number of assessments. To increase the chance that all responses will receive enough assessments, we recommend that you set the number of responses that students must assess to be higher than the number of assessments that each response must undergo. For example, if you require each response to receive three assessments, you could require each student to assess five responses.