Explore the evidence
4 of 88 decisions · clear everything
Survives the gold standardIndependent, durable, rigorousThe debunked shelfCheap winsFor parents at homeFamous numbers, deflatedWhere we admit ignoranceThe terrain
domain
- math6
- reading6
- early childhood5
- arts4
- health4
- science4
- debunked3
- practice3
- writing3
- character2
- grouping2
- history civics2
- homeschool2
- instruction style2
- motor skills2
- assessment1
- behavior1
- class size1
- computer science1
- curriculum1
- deliberate practice1
- feedback1
- mastery1
- physical development1
- practical1
- school structure1
- sport1
- talent1
- teachers1
- time1
- transfer1
- tutoring1
verdict
confidence
layer
Your situation · from the applicability layer — absence means “not yet assessed,” never “doesn’t apply”
who's delivering
group / setting
outcome class
Teaching handwriting works and transfers: freeing the hand frees composition, with gains still present at six months — even taught in groups of three.
moderate supportconf: mediumgc: medium8/818/48connected:Does teaching grammar improve chilDoes teaching movement transfer toDoes sentence combining improve wrDoes teaching spelling work, and w+1
Does handwriting and transcription instruction matter, and should young children type instead? · writing · ages 5–12
Teaching coding teaches coding: the one clean school RCT gives g=0.47-0.68. Which approach you pick barely matters, and almost every effect size rests on an instrument the developers built.
moderate supportconf: mediumgc: lowDoes teaching programming actually teach programming — and does the method matter? · computer-science · ages 5–18
Formal spelling instruction works (ES 0.54) and more formal beats less formal — explicit wins again, and it transfers beyond spelling itself.
moderate supportconf: mediumgc: low7/79/48connected:Does teaching grammar improve chilDoes sentence combining improve wrSystematic/explicit phonics vs whoExplicit instruction vs discovery/+3
Does teaching spelling work, and what does it transfer to? · writing · ages 5–18
Teaching grammar does not improve writing at any age tested — and it displaces the things that do.
negativeconf: mediumgc: low12/1227/48connected:Comprehensible input or explicit gDoes sentence combining improve wrDoes teaching spelling work, and wDoes handwriting and transcription+4
Does teaching grammar improve children's writing? · writing · ages 5–18
The URL is the state — any view you build here is a permalink you can hand to someone mid-argument.