Explore the evidence
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Survives the gold standardIndependent, durable, rigorousThe debunked shelfCheap winsFor parents at homeFamous numbers, deflatedWhere we admit ignoranceThe terrain
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Not yet assessed for this question · 15
- 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
- Grade retention — holding a child back versus promoting, and test-based promotion policies
- Ability grouping and tracking — four practices, four verdicts
- Vision — outdoor time against myopia, and screening and correction for achievement
- Length of the school day and year, time-on-task, extended time, and summer
- Breakfast, school meals, and micronutrients — what feeding children actually buys
- Preschool at scale — Head Start, state pre-K, and what universal provision delivers
- School spending, charters, and what school-level choices actually move outcomes
- School starting age, relative age, and academic redshirting
- Do later school start times increase adolescent sleep, and does that raise achievement?
- Teacher quality — selection over credentials and workshops
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