Heterogeneity analyses indicated significant variation in terms
of course size, with active learning having the highest impact
on courses with 50 or fewer students (Fig. 3B and Table S1C;
Q = 6.726, df = 2, P = 0.035; Fig. S4). Effect sizes were statistically
significant for all three categories of class size, however,
indicating that active learning benefitted students in
medium (51–110 students) or large (>110 students) class sizes
as well.