Explore the evidence
6 of 88 decisions · clear everything
Unallocated money is the worst buy in the database; the same dollars as No-Excuses charters buy +0.3–0.4 SD/yr — and the average charter is a precise null.
mixedconf: highgc: lowSchool spending, charters, and what school-level choices actually move outcomes · school-structure · ages 4–18 · structure
Should a school buy a social and emotional learning programme? · character · ages 4–18
Strategy instruction is writing's best-supported method — at roughly a fifth of its advertised size once measures are independent (d≈0.8 → ~0.15).
moderate supportconf: mediumgc: lowDoes strategy instruction (SRSD, the writing process) improve writing? · writing · ages 5–18
Yes — sight-reading, performance and aural skill move about half a standard deviation under instruction — but the evidence is quasi-experimental and thinner than the transfer literature built on top of it.
moderate supportconf: mediumgc: mediumDoes teaching music produce musical skill? · music · ages 4–18
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: lowDoes educational technology raise learning — CAI, adaptive software, devices, screens, and AI tutors? · edtech · ages 5–18 · structure
Attainment falls steadily with age of first exposure, but the sharp critical period is contested and an earlier classroom start buys nothing durable: start young for immersion, not for two lessons a week.
mixedconf: mediumgc: mediumIs there a critical period for learning a second language, and when should a child start? · foreign-language · ages 4–18
- Does arts education raise academic achievement?
- Does learning to code improve general thinking?
- Can executive function be trained, and does it transfer to learning?
- Physical activity as an input — dose, fitness, and school outcomes
- Explicit instruction vs discovery/inquiry — how much guidance?
- Does teaching grammar improve children's writing?
- Homeschool socialisation — the most-asked question, and the least answerable one
- Does teaching movement transfer to cognition, achievement, or lifelong activity?
- Phonemic awareness training (and whether it needs letters)
- Reading fluency — guided repeated oral reading, and whether repetition matters
- School starting age, relative age, and academic redshirting
- Teaching students to think scientifically — does it transfer?
- Vision — outdoor time against myopia, and screening and correction for achievement
- Early sport specialization, talent selection, and the relative age effect
The URL is the state — any view you build here is a permalink you can hand to someone mid-argument.