Syntheses

Topic pages answer one decision each. These read across the whole evidence base and say what to actually do — and in what order, given that most of what schools spend money on does not survive the rigor bar.

The School Builder's Playbook
If you were building a school for ages 4-18 and cared only about what causally works — judged under the premise that ability is substantially heritable, so only selection-resistant evidence counts — this is what the database says to do, ranked by evidence strength times cost. Twenty-six verified decisions, 165 graded sources, every verdict adversarially reviewed.
Updated 2026-07-19