Larry Cuban writes that efforts to standardize teaching invariably fail because teachers adapt whatever they are given to the students they teach.

The past half-century has seen record-breaking attempts by policymakers to influence how teachers teach. Record-breaking in the sense that again and again (add one more “again” if you wish) federal and state policymakers and aggressive philanthropists have pushed higher curriculum standards in math, science, social studies, and reading decade after decade. With federal legislation of No Child Left Behind (2002-2015) and Every Student Succeeds Act (2015-) teaching has been influenced, even homogenized (following scripts, test prep, etc.) in those schools threatened by closure or restructuring. Now with Common Core standards, the push to standardize math and language arts instruction in K-12 (e.g., close reading for first graders) repeats earlier efforts to reshape classroom lessons. If past efforts are any indicator, then these efforts to homogenize teaching lead paradoxically, to more, not less, variability in lessons. But this increased variation in teaching seldom alerts policymakers and donors in their offices and suites to reassess the policies they adopt.

The take-aways from this post are first, policies aimed at standardizing classroom practice increase variation in lessons, and, second, teachers are policymakers.

Policies aimed at standardizing classroom practice increase variation in lessons