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McClintock, Evan D.; Tzur, Ron; Xin, Yan Ping; Si, Luo – North American Chapter of the International Group for the Psychology of Mathematics Education, 2011
We examined how a student with learning disabilities (SLD) in mathematics constructed a scheme for differentiating, selecting, and properly operating on/with units that constitute a multiplicative situation, namely, singletons ('1s') and composite units (abbreviated UDS). Conducted as part of a larger teaching experiment in a learning environment…
Descriptors: Learning Disabilities, Mathematics Instruction, Multiplication, Grade 5

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