The Evidence on Teaching

Explore the evidence

7 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

Mastery learning moves tests of what it taught (~0.25) and barely moves independent measures (~0.05) — and time-to-mastery gaps widen, converting ability differences into time.

mixedconf: highgc: low
6/69/48connected:Does educational technology raise Retrieval practice (the testing efPlacement and mastery diagnosis

Mastery learning (teach → test → reteach to criterion → advance) · mastery · ages 6–18 · method

Teaching movement teaches movement: the skills improve, but transfer to cognition, achievement, or lifelong activity is near zero in the best trials.

no effectconf: highgc: medium
7/710/48connected:Does arts education raise academicPhysical activity as an inputDoes teaching grammar improve chilDoes handwriting and transcription+5

Does teaching movement transfer to cognition, achievement, or lifelong activity? · physical-development · ages 4–18

Later bells buy adolescents 40+ measured minutes of sleep — the best-identified positive effect in the archive; the achievement payoff is real but far smaller.

strong supportconf: mediumgc: low
18/1836/48

Do later school start times increase adolescent sleep, and does that raise achievement? · health · ages 11–18 · input

Outdoor time prevents myopia from starting (not progressing); screening plus free glasses raises test scores in children who need them. Two claims, both real.

moderate supportconf: mediumgc: low
17/1736/48

Vision — outdoor time against myopia, and screening and correction for achievement · health · ages 4–18 · input

Correcting a real deficiency moves cognition (iron in anaemic children: 0.79 SD); supplementing already-fed children moves nothing (35 RCTs, 19,343 children).

mixedconf: mediumgc: low
20/2018/48connected:Does teaching movement transfer to

Breakfast, school meals, and micronutrients — what feeding children actually buys · health · ages 4–18 · input

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

School exercise programs don't raise achievement: four of the five largest RCTs are null, and more dose doesn't rescue it. Exercise for health, not for grades.

no effectconf: mediumgc: low
24/2429/48connected:Does teaching movement transfer to

Physical activity as an input — dose, fitness, and school outcomes · health · ages 4–18 · input

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