Particular attention is being paid to the implementation of the Common Core State Standards in Massachusetts, where students have a history of being high-achievers under a strong curriculum. Educators in the commonwealth report more students are struggling under the common core -- and they say that's not necessarily a bad thing. "But it's really about pushing the reasoning and the abstract thinking part of it. I think that was really missing from the old standards," said eighth-grade teacher Michelle Calioro.

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