From the book A Year Without Pants: and the Future of Work by Scott Berkun:

A great fallacy born from the failure to study culture is the assumption that you can take a practice from one culture and jam it into another and expect similar results.

His context is replicating the success of one tech company by simply copying their approach to business. But you could make the same statement about schools, classrooms and teachers.

Too many education reformers declare we can solve all our education problems by simply finding “what works”, those “best practices”, and duplicate them in every school.

Completely ignoring the many variables found in different groups of children, their schools, and the cultures of the communities in which they live.