6 jun 2016 año - "How Bill Gates pulled off the swift Common
Core revolution"
The Washington Post 2016, Jun 6
Descripción:
The pair of education advocates had a big idea, a new approach to transform every public-school classroom in America. By early 2008, many of the nation’s top politicians and education leaders had lined up in support.
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fecha:
6 jun 2016 año
Ahora mismo
~ 9 years and 4 months ago