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Schneider, Rose M.; Sullivan, Jessica; Guo, Kaiqi; Barner, David – Child Development, 2021
Although many U.S. children can count sets by 4 years, it is not until 5½--6 years that they understand how counting relates to number--that is, that adding 1 to a set necessitates counting up one number. This study examined two knowledge sources that 3½- to 6-year-olds (N = 136) may leverage to acquire this "successor function": (a)…
Descriptors: Computation, Number Concepts, Young Children, Arithmetic
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McNeil, Nicole M. – Child Development, 2008
Do typical arithmetic problems hinder learning of mathematical equivalence? Second and third graders (7-9 years old; N= 80) received lessons on mathematical equivalence either with or without typical arithmetic problems (e.g., 15 + 13 = 28 vs. 28 = 28, respectively). Children then solved math equivalence problems (e.g., 3 + 9 + 5 = 6 + __),…
Descriptors: Children, Grade 2, Grade 3, Grade 5