For five years, a San Francisco foundation funded, and a research organization closely monitored, a collaboration by 10 California districts to raise achievement under the Common Core math standards.

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It's been a familiar scene in Louisiana public schools for more than a decade, that point in fourth grade when students learn how fractions are related to decimals. Judy Milford is teaching the ...

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During the five years since California adopted the Common Core State Standards for mathematics and English language arts, the search for high-quality textbooks and curriculum materials has been a ...