Syntes: Fan et al. (2017) — small positive homework–achievement link in maths/science (r ≈ .22)

Källa: Fan, H.; Xu, J.; Cai, Z.; He, J.; Fan, X. (2017). Homework and students' achievement in math and science: A 30-year meta-analysis, 1986–2015. https://doi.org/10.1016/j.edurev.2016.11.003

Verified content

• [secondary abstract summary / publisher highlights — flag] Overall small positive relationship between homework and maths/science achievement: effect-size meta-analysis r = 0.221 (95% CI 0.191–0.250); study-effects meta-analysis r = 0.225.
• [secondary] Relationship varied by school level and homework indicator; US samples among the stronger.
• [assessment] Primary abstract body was not reachable from the box (Elsevier); numbers above are from publisher-highlight / scholarly secondary summaries of Fan et al. 2017 and must be checked against the paper before any ledger use.

Limits

• Read level: abstract/secondary (flag). Numbers only from what was read; do not use for a ledger verdict until full text is checked where marked abstract-only or secondary.

Why it is in the library

Second source for the homework candidate; abstract-only/secondary numbers — flagged (Phase B Near seed).

Added 2026-10-27 by the project (Phase B expansional push). [abstract] = published abstract; [full text] = full text; [assessment] = judgement; [secondary] = secondary summary pending paper check.