In grade 8, 1-group with coaching is the most effective arm (LATE = 0.57 SD) while the other arms show small insignificant effects¶

Claim · All claims
Evidence · 1 study · causal r2 · q3 · i2 medium
Currency · newest study 2025 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i2 In grade 8, 1-group with coaching has the largest effect (LATE = 0.57 SD); 1-group and 1-1 with coaching have small positive but insignificant effects. → 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 · i2 · causal · r2

Grade-8 arm of the randomized trial, per-arm effects on the post-test. The printed effect size LATE = 0.57 SD for 1-group with coaching; a formal equality test across arms cannot reject equality (P = 0.37).

"For grade 8, on the contrary, 1-group with coaching is the most effective intervention (LATE = 0.57 SD), while 1-group and 1-1 with coaching has small positive but insignificant effects."

Discussion¶

Related Claims¶

• 1-group in grade 2 is the most cost-effective intervention variant, with per-pupil costs from $392 to $1273 across arms — related
• In grade 2, 1-1 with coaching shows the largest effect (LATE = 0.8 SD) and 1-group is also significant, while 1-group with coaching is insignificant — related
• Tailored small-group mathematics instruction significantly improves math outcomes for low achievers in grades 2 and 8 — related