The article points out that they want the teachers to be accepting of different problem solving approaches. My son had a problem in school and I showed him how to solve it. He said the teacher wouldn’t like the approach I used to solve it. It produced the correct answer and was the approach I remember learning.
IMHO, as long as the approach produces the correct answer what difference does it make? Perhaps it makes it more difficult to grade partial credit. The idea that different approaches are due to white privilege is ridiculous.
There is nothing wrong with teaching multiple methids to solve problems. There is nothing wrong with advocating one method over the others.
What is wrong is creating an entire generation of people who can’t count change and failing to recognize that there is a problem.
The whole idea that the right answer is unimportant smells like the “soft bigotry of low expectations”.