Claims

1-group in grade 2 is the most cost-effective intervention variant, with per-pupil costs from $392 to $1273 across arms

Claim · All claims
Evidence · 1 study · causal r2 · q3
Currency · newest study 2025 · not yet checked against its sources · not reviewed by a person

Subclaims

Reading the evidence codes

q is the design tier, i the impact, n the sample, and the kind with its r the rigour judged within that kind: what each code means.

This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.

q3 i? After cost standardization, 1-group in grade 2 is the most cost-effective variant; per-pupil costs ranged from $392 (1-group, grade 2) to $1273 (1-1 with coaching, grade 2). → Rosholm 2025

Evidence

Rosholm 2025

Rosholm, M., Tonnesen, P. B., Rasmussen, K., Overgaard, S., Færch, J. V., Malm, S. G. & Harder, J. (2025). A tailored small group instruction intervention in mathematics benefits low achievers. npj Science of Learning 10, 18. https://doi.org/10.1038/s41539-025-00310-9

q3 · i? · causal · r2

Cost-effectiveness analysis of the trial arms; costs comprised teacher salaries, training costs including substitutes, and coaching costs, converted at 6.42 DKK/US$. The article states "the most cost-effective intervention is 1-group in grade 2"; no effect size is printed for this comparison.

"Per pupil costs ranged from $392 (1-group in grade 2) to $1273 (1-1 with coaching in grade 2)."

Discussion

Page metadata
Field Value
type claim
id 1-group-grade2-most-cost-effective
title 1-group in grade 2 is the most cost-effective intervention variant, with per-pupil costs from $392 to $1273 across arms
description 1-group in grade 2 is the most cost-effective intervention variant, with per-pupil costs from $392 to $1273 across arms
status review
evidence_strength moderate
newest_evidence 2025
generated by process:wiki-ingest on 2026-10-26
trust unverified — no one has confirmed this page's content
sources 1 — rosholm-2025

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