The Evidence on Teaching

Explore the evidence

8 of 88 decisions · clear everything

Survives the gold standard Independent, durable, rigorous The debunked shelf Cheap wins For parents at home Famous numbers, deflated Where we admit ignorance The terrain

evidenceall drop D A–B A only

evaluatorany no dev-led independent

durabilityany follow-up ≥1yr ≥2yr

what are these? →

Your situation · from the applicability layer — absence means “not yet assessed,” never “doesn’t apply”

who's delivering

group / setting

cost

outcome class

Group within classes or across grades by subject: modest, nearly free wins. Whole-school streaming does nothing, and early between-school tracking harms the bottom.

moderate supportconf: highgc: low

12/1236/48connected:Do career and technical education

Ability grouping and tracking — four practices, four verdicts · grouping · ages 5–18 · structure

Accelerate ready kids: they keep pace with older classmates, bank a year, and show no social-emotional harm at 50. The gifted label itself does nothing; the content does.

moderate supportconf: highgc: medium

8/830/48connected:Algebra timing

Acceleration and gifted programs — the label vs the content · grouping · ages 5–18 · structure

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

Guided inquiry is positive in 16 of 16 PISA regions and unguided inquiry negative in 18 of 20 — but the programmes built on that finding go to zero at scale: +0.22, then +0.01, then +0.02 on the same test.

mixedconf: mediumgc: low

19/1927/48connected:Science content sequencing Explicit instruction vs discovery/Laboratory and practical work in s Teaching students to think scienti

Inquiry-based science teaching vs explicit and textbook science teaching · science · ages 8–18

Two reviews screened ~12,000 records and found one RCT and six quasi-experiments. What evidence exists favours interest (+0.12) over attainment (+0.01), and simulations match real apparatus.

mixedconf: mediumgc: low

22/2221/48connected:Science misconceptions and concept Inquiry-based science teaching vs

Laboratory and practical work in school science · science · ages 5–18

Conceptual-change teaching reliably moves the test and nothing shows it removes the intuition. Corrected for design and publication bias, a taught unit is g≈0.64 and a refutation text g≈0.28.

mixedconf: mediumgc: low

10/1017/48connected:Laboratory and practical work in s

Science misconceptions and conceptual change — can naive intuitions be taught away? · science · ages 6–18

Narrow reasoning routines are teachable and stay taught for seven months. The far-transfer claim failed its one randomised test: science −0.01, English −0.15, maths −0.11.

no effectconf: mediumgc: low

14/1412/48connected:Inquiry-based science teaching vs

Teaching students to think scientifically — does it transfer? · science · ages 7–18

No trial has ever varied the sequence of science content and measured the result. The one quasi-experimental test of course order found nothing, and depth-over-breadth is a retrospective survey worth 0.08-0.13 SD.

insufficientconf: mediumgc: medium

15/1515/48connected:Background knowledge and vocabular Interleaving (mixing problem types Explicit instruction vs discovery/Inquiry-based science teaching vs +1

Science content sequencing — coherence, prerequisites, and course order · science · ages 5–18

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