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
Your situation · from the applicability layer — absence means “not yet assessed,” never “doesn’t apply”
who's delivering
outcome class
Diagnose what a child already knows: teachers cut 40–50% of curriculum for high-ability children and achievement ROSE. The payoff is skipping, not monitoring.
moderate supportconf: mediumgc: medium16/1625/48connected:Does educational technology raise Feedback and formative assessmentMastery learning (teach → test → r
Placement and mastery diagnosis — deciding what to teach next from evidence of current skill · assessment · ages 5–18 · structure
Coaching buys ~0.25 SD of score and has for 42 years — a fraction of what's advertised — and none of it is ability. The score moves; the construct doesn't.
mixedconf: mediumgc: medium20/2036/48
Test preparation — does coaching raise scores, and does a raised score mean raised ability? · assessment · ages 5–18 · structure
Trust the composite; distrust the breakdown. Subtest strengths-and-weaknesses replicate at chance on retest, and most of what people read off a score report is noise.
mixedconf: mediumgc: low21/2124/48
What a standardized achievement score does and does not license · assessment · ages 5–18 · structure
Not yet assessed for this question · 16
- Acceleration and gifted programs — the label vs the content
- Chronic absenteeism — does raising attendance raise achievement?
- Class-size reduction
- Curriculum choice as a school-level lever
- Physical activity as an input — dose, fitness, and school outcomes
- Fadeout — why early gains disappear, and what actually persists
- Ability grouping and tracking — four practices, four verdicts
- The early home environment — what parents can and cannot causally move
- Breakfast, school meals, and micronutrients — what feeding children actually buys
- Preschool at scale — Head Start, state pre-K, and what universal provision delivers
- Perry Preschool and Abecedarian — what the famous studies actually establish
- School spending, charters, and what school-level choices actually move outcomes
- School starting age, relative age, and academic redshirting
- Talent and trainability — what is heritable, and what that does not license
- Teacher quality — selection over credentials and workshops
- Vision — outdoor time against myopia, and screening and correction for achievement
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