Explore the evidence
5 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
layer
Your situation · from the applicability layer — absence means “not yet assessed,” never “doesn’t apply”
group / setting
outcome class
Grit is conscientiousness renamed and adds 0.4% to grade prediction; self-control genuinely predicts life outcomes but is 60% heritable with zero shared environment, and training moves ratings, not lives.
mixedconf: highgc: medium20/2036/48connected:Should a school buy a social and eDoes teaching a growth mindset raiHow should a school run its classr
Are self-control and grit teachable levers on achievement? · character · ages 4–18
Growth-mindset interventions change beliefs almost everywhere and change achievement almost nowhere: the two independent national-scale trials measured standardized tests and found exactly zero.
mixedconf: highgc: low18/1829/48connected:FadeoutSystematic/explicit phonics vs whoTalent and trainabilityAre self-control and grit teachabl
Does teaching a growth mindset raise achievement? · character · ages 4–18
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
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.