States that don't spend money to train Pre-K teachers & have small classes don't have gains. http://www.nytimes.com/2015/10/04/opinion/sunday/does-pre-k-make-any-difference.html …pic.twitter.com/FmgKpU0KpE
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@zeynep yok oyle birsey
Resources matters most at pre-K to 12. I
being a college professor & but late intervention is hard. Paths are already set. Invest early!
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