Abstract
Decimals are receiving more as well as earlier emphasis in today's elementary school mathematics programs. The increased use of calculators and metric measurement coupled with a reexamination of the appropriateness of the scope and sequence of common fractions provide impetus for such a change. The results of the second mathematics assessment of the National Assessment of Educational Progress (NAEP) can help us make this change effectively. They give some indication of how 9-year-olds handled decimals prior to much formal instruction and insight into areas of difficulty for 13-year-olds who have received instruction.
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