wu (again) on teachers and mathematics educators (present company presumably included)
Because the flawed [mathematics] they [preservice teachers] learned as K-12 students is not exposed, much less corrected, they unwittingly inflict [this flawed mathematics] on their own students when they become teachers. So it comes to pass that [this flawed mathematics] is recycled in K—12 from generation to generation. Today, this vicious cycle is so well ingrained that many current and future mathematics educators also are victimized by [this flawed mathematics], and their vision of K—12 mathematics is impaired.
what i think he’s saying
We cannot entrust decisions about mathematics content in curriculum to anyone but mathematicians because everyone else misunderstands what mathematics is (but it’s not their fault as individuals-forgive them for they know not what they do.)