The Evidence on Teaching

Explore the evidence

2 of 88 decisions · clear everything

Survives the gold standardIndependent, durable, rigorousThe debunked shelfCheap winsFor parents at homeFamous numbers, deflatedWhere we admit ignoranceThe terrain
evidencealldrop DA–BA only
evaluatoranyno dev-ledindependent
durabilityanyfollow-up≥1yr≥2yr
what are these? →
sortconfidencerobustfragileA–Z
domain
verdict
confidence
layer
Your situation · from the applicability layer — absence means “not yet assessed,” never “doesn’t apply”
who's delivering
group / setting
cost
outcome class

Early specialization predicts junior success; later starts plus other sports predict adult world-class. Selecting on junior results selects the wrong athletes.

mixedconf: mediumgc: medium
7/724/48

Early sport specialization, talent selection, and the relative age effect · sport · ages 6–18

Near-zero in primary and almost entirely correlational in secondary. The causal base is three small trials; what the homework IS beats how much of it there is.

mixedconf: mediumgc: medium
16/1629/48

Homework — effects by age and by dosage · homework · ages 5–18 · structure

The URL is the state — any view you build here is a permalink you can hand to someone mid-argument.