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The Impact of Out-of-School Learning on Academic Achievement in Elementary and Secondary Education: A Meta-Analysis

Delen et al. 2026 · review pooling many studies (meta-analysis) · touches 1 claim · used in 1 attack

Which beliefs it touches

C28 Learning outside the classroom backs it up
Full text (2026-11-08): 42 studies, g = 0.529 overall, but randomised studies g = 0.307 vs non-randomised 1.020; North America 0.149 and Scandinavia 0.180 (CIs cross zero); stronger in elementary; no test-delay analysis.