Science, Math & History: the struggle to marry content & pedagogy

Larry Cuban:

Entangled, impossible to separate, that is what content and pedagogy have been and are in U.S. schooling. But not to reformers.
For decades, in science, math, and history policymakers, researchers, teacher educators, practitioners, and parents have argued over what kind of content should be taught in classrooms, playing down the inevitable presence of pedagogy or how the subject should be taught. Amnesiac reformers, pumped full of certitude, have pushed forward with “new science,” “new math” and “new history” curricula many times over the past century believing that the content in of itself-particularly delivered by academic experts-will magically direct teachers how to put innovative units and lessons into practice in their classrooms.
Well-intentioned but uninformed, these reformers have ignored how knotted and twisted together they are. Knowing content is one strand and how to teach it is the other. Entwined forever.