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Direct linkUlrich, Catherine; Wilkins, Jesse L. M. – International Journal of STEM Education, 2017
Background: Students' ability to construct and coordinate units has been found to have far-reaching implications for their ability to develop sophisticated understandings of key middle-grade mathematical topics such as fractions, ratios, proportions, and algebra, topics that form the base of understanding for most STEM-related fields. Most of the…
Descriptors: STEM Education, Grade 6, Middle School Students, Mathematics Skills
Thompson, Clarissa A.; Opfer, John E. – Child Development, 2010
How does understanding the decimal system change with age and experience? Second, third, sixth graders, and adults (Experiment 1: N = 96, mean ages = 7.9, 9.23, 12.06, and 19.96 years, respectively) made number line estimates across 3 scales (0-1,000, 0-10,000, and 0-100,000). Generation of linear estimates increased with age but decreased with…
Descriptors: Experimental Groups, Grade 6, Grade 2, Age Differences
