Explore the evidence
3 of 88 decisions · clear everything
Survives the gold standardIndependent, durable, rigorousThe debunked shelfCheap winsFor parents at homeFamous numbers, deflatedWhere we admit ignoranceThe terrain
domain
layer
survival prior
Your situation · from the applicability layer — absence means “not yet assessed,” never “doesn’t apply”
who's delivering
group / setting
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
Manipulatives help when bland, guided, and aged ~7–11 — a guided-representation effect, not 'hands-on learning.' Rich, toy-like objects hurt transfer.
moderate supportconf: mediumgc: low3/36/48
Manipulatives and concrete-representational-abstract (CRA) sequences · math · ages 5–14
Sort by what the software replaces: adaptive drill inside the school day buys +0.05-0.20 SD; a device, a connection or the teacher buys zero to negative; LLM tutors have no usable evidence at all.
mixedconf: mediumgc: low53/5339/48connected:Placement and mastery diagnosisMastery learning (teach → test → rTutoringClass-size reduction
Does educational technology raise learning — CAI, adaptive software, devices, screens, and AI tutors? · edtech · ages 5–18 · structure
The URL is the state — any view you build here is a permalink you can hand to someone mid-argument.