Sir Ken Robinson…

It’s about customizing them [conditions in which learning will flourish] to your circumstances, and personalizing education to the people you are actually teaching. It’s not about scaling a new solution, it’s about creating a movement in education in which people develop their own solutions, but with external support, based on a personalized curriculum.

Whenever somebody brings “scale” into the conversation it’s meant to obfuscate possibilities into some mathematical realm in which the result is, inevitably, “this won’t scale”. That’s why movements are more interesting.