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Gersten, Russell; Schumacher, Robin F.; Jordan, Nancy C. – Journal of Learning Disabilities, 2017
Magnitude understanding is critical for students to develop a deep understanding of fractions and more advanced mathematics curriculum. The research reports in this special issue underscore magnitude understanding for fractions and emphasize number lines as both an assessment and an instructional tool. In this commentary, we discuss how number…
Descriptors: Numbers, Number Systems, Fractions, Mathematical Models

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