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Textbook Diversity May Be Increasing Under Common Core

In looking at K-8 math materials in California, he (ed. note: Morgan Polikoff, a professor at the University of Southern California) found that the 6,000-plus schools for which he could interpret the data were using 261 unique textbooks during the 2013-14 school year. That’s a 17 percent increase in unique books from 2012-13, he found. During that same time, the percentage of schools using common-core textbooks went up from 3 percent to 24 percent. 

That means that textbook diversity is increasing, not decreasing, as more schools begin using common-core materials. ”This runs counter to what many people think—that common core is standardizing and homogenizing,” said Polikoff.