Explore the evidence
2 of 88 decisions · clear everything
Survives the gold standardIndependent, durable, rigorousThe debunked shelfCheap winsFor parents at homeFamous numbers, deflatedWhere we admit ignoranceThe terrain
domain
- math5
- reading5
- arts4
- early childhood4
- health4
- science4
- history civics3
- practice3
- writing3
- foreign language2
- grouping2
- homeschool2
- instruction style2
- motor skills2
- time2
- assessment1
- character1
- class size1
- computer science1
- curriculum1
- debunked1
- feedback1
- homework1
- music1
- physical development1
- practical1
- retention1
- school structure1
- sport1
- teachers1
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
Testing yourself beats rereading — robust in real classrooms; honest durable size ~0.1–0.3 SD, biggest after delay, thinnest on transfer.
strong supportconf: highgc: low10/1018/48connected:Feedback and formative assessmentMastery learning (teach → test → rSpaced (distributed) practice
Retrieval practice (the testing effect) · practice · ages 8–18 · method
Spacing beats massing at equal total time — the most robust finding in learning science. Space repetitions at ~10–20% of how long you need to remember.
strong supportconf: highgc: low7/712/48connected:Interleaving (mixing problem typesMath-fact fluency and timed practiRetrieval practice (the testing ef
Spaced (distributed) practice · practice · ages 6–18 · method
Not yet assessed for this question · 7
- Algebra timing — acceleration mandates, delay mandates, and readiness-based placement
- Explicit vs reform/constructivist math instruction
- Interleaving (mixing problem types vs blocking)
- Manipulatives and concrete-representational-abstract (CRA) sequences
- Math curriculum choice — how much does the textbook matter?
- Word problems, schema instruction, and the conceptual-vs-procedural question
- School spending, charters, and what school-level choices actually move outcomes
The URL is the state — any view you build here is a permalink you can hand to someone mid-argument.