What one hundred years of research says about the effects of ability grouping and acceleration on K–12 students' academic achievement: findings of two second-order meta-analyses by Saiying Steenbergen-Hu and others 2026-10-24
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Primary text, publisher or institutional record: eric.ed.gov/?id=EJ1121483
Relevant evidence: Thirteen ability-grouping meta-analyses; distinguish grouping arrangements, acceleration and comparator populations.
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