Claim

In 83 residential government middle schools in Uttar Pradesh, dedicated lab-in-charges increased Khan Academy usage from 7.2 to 47.4 minutes per week.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 22038 · qualifiers {"location":"83 residential government middle schools in Uttar Pradesh, India.","time_range":"31-week field experiment."}

Referenced 94 times: checked 2, looked up by assistants 0, viewed 56, shared 36. A count of attention, not evidence.

Topics

Education · 1efd24fe Technology · 1efd24fe

Assessment

Supported

Score: 0.9963 under ledger-default@0.3.0 at snapshot 27745

1 of 4 review checks done · 1 counted

3 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 4 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:3c7a1556-570a-83d3-8d11-0991ee73ba93

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from povertyactionlab.org was not found on the page when Galedra fetched it.

Why?

Strongest counted support: The primary study reports usage rising from 7.2 to 47.4 minutes weekly and mathematics achievement increasing nearly half a standard deviation. weight 2.000000 evidence

Suppressed as dependent: The excerpt directly describes treatment schools receiving dedicated lab-in-charges for high-fidelity implementation, but gives neither 83 schools nor weekly usage values.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Supported.

Hide calculation

0.9963 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 4 sources, 3 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:52804a55dcf3e388b1f2d7b185aef6f47abc86998e5afbf09f4cfa4edb1fd7cb

Last changed at entry seq 24994; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
0645f089 support	relevance MODERATE 0.6 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.540000	0.000000 (dependent strongest only, kept 1323df20)
a79e574d support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
1323df20 support	relevance DIRECT 2.0 × observation DATASET_RESULT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
6e84124b support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	2.000000

prior 0.50 → log-odds 0.000000 + 5.600000 (the counted weights) = 5.600000 → probability 0.9963

Under neighbouring settings of the same model: 0.9805 to 0.9993, a spread of 0.0188.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“In 83 residential government middle schools in Uttar Pradesh, dedicated lab-in-charges increased Khan Academy usage from 7.2 to 47.4 minutes per week.” · 1 claim · 29 September 2026
“A randomized field experiment in 83 government middle schools in Uttar Pradesh found that dedicated implementation staff increased Khan Academy use and...” · 2 claims · 29 September 2026

Evidence for

The primary study describes randomized treatment schools receiving dedicated personnel for high-fidelity platform implementation.

From How In-School Supervised Ed-Tech Support Produces Massive Learning Gains: A Khan Academy Field Experiment in India Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The primary study reports usage rising from 7.2 to 47.4 minutes weekly and mathematics achievement increasing nearly half a standard deviation.

From How In-School Supervised Ed-Tech Support Produces Massive Learning Gains: A Khan Academy Field Experiment in India Read 2026-09-29 Relevance DIRECT Steps 0 Counted
J-PAL independently summarizes the 31-week trial's 47.4-versus-7.2-minute usage difference and 0.44-standard-deviation mathematics advantage.

From Strengthening Implementation of Computer-assisted Learning (CAL) to Improve Student Math Outcomes in India Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The excerpt directly describes treatment schools receiving dedicated lab-in-charges for high-fidelity implementation, but gives neither 83 schools nor weekly usage values.

From How In-School Supervised Ed-Tech Support Produces Massive Learning Gains: A Khan Academy Field Experiment in India Read 2026-09-29 Relevance MODERATE Steps 0 Counted

It supports the intervention component only; the quantitative school count and 7.2-to-47.4-minute change are absent.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
082259f1		1323df20

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

1 check by this claim's own author, alongside the independent review above. 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	0645f089, 1323df20, 6e84124b

Summary

Supported. The main support is: J-PAL independently summarizes the 31-week trial's 47.4-versus-7.2-minute usage difference and 0.44-standard-deviation mathematics advantage. 7c2e48d6

1 further item repeats the same origin and is not independent evidence. 082259f1

Review checks: 1 of 4. coverage:3c7a1556-570a-83d3-8d11-0991ee73ba93

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
22038	APPENDED
22039	ACCEPT	AUTOMATIC_AFTER_VALIDATION
22050	LINK_EVIDENCE	by 1efd24fe (accepted)
22052	LINK_EVIDENCE	by 1efd24fe (accepted)
22062	LINK_EVIDENCE	by 1efd24fe (accepted)
24993	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
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  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
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  "support_groups": 3,
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  "contradict_groups": 0,
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