This is real and under consideration in California right now. The Bill and Melinda Gates foundation is supporting this organization.

https://www.cde.ca.gov/ci/ma/cf/index.asp

There is an opinion piece on this in the WSJ now:

https://www.wsj.com/articles/california-leftists-try-to-canc...

https://www.cde.ca.gov/ci/ma/cf/mathfwrevtimeline2021.asp

Rich whites like Bill Gates, who went to the elite private Lakeside High School, want publicly schooled kids (including browns and blacks to essentially not receive Math classes).