Khan Academy critique addresses some myths about math learning.

If it were my world, I'd wait for the Practitioners' first iteration of stuff (technical term) because I'd want much of what we develop built on the activities they've got going. And then, if need be, we'd extend our stuff beyond theirs--to get said everything we need to say. But I'd like to begin within the Practitioners' frame.

Has tools developed by folks who have taken his workshop