It's not just the assumption of a blank slate -- it's the assumption that because everyone is a blank slate, differences between people must be the result of op

It's not just the assumption of a blank slate -- it's the assumption that because everyone is a blank slate, differences between people must be the result of oppression or racism of some kind, and that the primary purpose of education is not to teach, but rather to fight that oppression. Even mathematics education is now being twisted by this -- it's now seen as more important for math classes to pursue equality/equity than it is to teach math. One outcome of this is a levelling effect -- an equal outcome for all students, in which they all possess average mathematical skills, is preferred to a situation in which some students perform above average.