Explore the evidence
4 of 88 decisions · clear everything
Survives the gold standardIndependent, durable, rigorousThe debunked shelfCheap winsFor parents at homeFamous numbers, deflatedWhere we admit ignoranceThe terrain
Your situation · from the applicability layer — absence means “not yet assessed,” never “doesn’t apply”
who's delivering
group / setting
cost
outcome class
Timed retrieval practice builds arithmetic automaticity — beating identical untimed tutoring head-to-head — and the anti-timed-test harm claims have no causal evidence.
strong supportconf: highgc: low7/711/48connected:Does homeschooling raise achievemeSpaced (distributed) practiceWord problems, schema instruction,
Math-fact fluency and timed practice (and the anti-timed-test claims) · math · ages 5–12
Systematic phonics beats whole language for word reading — largest in K-1 and for at-risk readers; near-null for comprehension and past grade 3.
strong supportconf: highgc: low18/1836/48connected:Does teaching a growth mindset raiDoes homeschooling raise achievemePhonemic awareness training (and wReading-comprehension strategy ins+3
Systematic/explicit phonics vs whole language and balanced literacy · reading · ages 4–9
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: medium15/1515/48connected:Background knowledge and vocabularInterleaving (mixing problem typesExplicit instruction vs discovery/Inquiry-based science teaching vs +1
Science content sequencing — coherence, prerequisites, and course order · science · ages 5–18
Nobody has tested it. There is no controlled trial in which art instruction is the input and independently measured art skill is the outcome — the field's core claim is the one it never studied.
insufficientconf: lowgc: medium6/618/48connected:Does arts education raise academicBrain Gym, Whole Brain Teaching, aAre museum and theatre trips worth
Does teaching visual art produce artistic skill? · arts · ages 4–18
The URL is the state — any view you build here is a permalink you can hand to someone mid-argument.