Scaffolds yielded minimal effects for advanced-placement school students¶

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

Subclaims¶

q3 i? Within the advanced-placement school subgroup, neither learner characteristics nor experimental conditions had much impact on knowledge of fractions on the number line. → Sarah I. Hofer 2025

Evidence¶

Sarah I. Hofer 2025¶

Sarah I. Hofer, Frank Reinhold. (2025). Scaffolding of learning activities: Aptitude-treatment-interaction effects in math?. Learning and Instruction 99 (2025) 102177. https://doi.org/10.1016/j.learninstruc.2025.102177

q3 · i? · causal · r?

GLMM interaction analyses in the APS subgroup (192 of 332 students) showed no notable scaffold-by-characteristic interactions; the article attributes this to the intervention being more challenging for VS students, who had greater potential to benefit from scaffolding.

"To summarize, variation both in learner characteristics and in experimental conditions within the APS subgroup had little impact on knowledge about fractions on the number line (Fig. 6)."

Discussion¶

Related Claims¶

• First graders' whole number magnitude knowledge predicts eighth graders' fraction magnitude knowledge after controlling for arithmetic, cognitive, and demographic variables — related
• Advanced-placement students outperformed vocational-school students on most learner characteristics, with large effect sizes except interest — related
• The multi-component measurement-focused fraction intervention outperforms part-whole-focused control on NAEP items, number line estimation, and calculations — related