Diagnostic Test 2

Across two sections of a course, students who received instructor feedback within 12 hours scored higher on the next quiz than those who waited 48 hours.

One cohort that required weekly peer comments saw stronger discussion participation by midterm than prior cohorts.

In observational data from 15 classes, students in courses with fast comment threads were more likely to pass the final exam, though students also differed in prior GPA.

In a multisite randomized experiment, elaborated peer comments delivered 72 hours after submission produced the same six week retention gains as identical comments delivered within 24 hours.