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Bailey, Drew H.; Fuchs, Lynn S.; Gilbert, Jennifer K.; Geary, David C.; Fuchs, Douglas – Child Development, 2020
We present first-grade, second-grade, and third-grade impacts for a first-grade intervention targeting the conceptual and procedural bases that support arithmetic. At-risk students (average age at pretest = 6.5) were randomly assigned to three conditions: a control group (n = 224) and two variants of the intervention (same conceptual instruction…
Descriptors: Grade 1, Grade 2, Grade 3, Elementary School Students