[The Collaborative said, “This year, most states administered tests aligned to higher standards for the second consecutive year. Overwhelmingly, student proficiency in math and reading increased.”
Perhaps, but rather unlikely. The much more likely reason is the well-known “test familiarity” effect, where teachers and students get to know the test over time and also frequently adjust their test-taking skills. The fact that there was a very sharp drop in the NAEP scores across the nation in 2015, first time in over a decade, suggests that students’ achievement has not increased but just the opposite – that achievement dropped with the introduction of Common Core.