Review Roundup

Reviewers praise Visible Learning for making a vast research base usable, encouraging teachers to test assumptions, focus on impact, and become more research-aware. Some regard its synthesis as a valuable guide to what has already been tried. Critics argue that combining studies with differing methods, contexts, and quality creates misleading certainty. They also challenge the 0.4 “hinge point” as arbitrary, warn against reducing classroom complexity to rankings, and note acknowledged errors in the book’s Common Language Effect Size calculations.