Comparing the frequency and variation of additive word problems in United States first‐grade textbooks in the 1980s and the Common Core era
Autor: | Shelby McCrackin, Robert C. Schoen, Ian Whitacre, Zachary M. Champagne |
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Rok vydání: | 2021 |
Předmět: | |
Zdroj: | School Science and Mathematics. 121:110-121 |
ISSN: | 1949-8594 0036-6803 |
DOI: | 10.1111/ssm.12447 |
Databáze: | OpenAIRE |
Externí odkaz: |