Low-income students are twice as likely to be taught math by a teacher who is teaching “out of field” than are other students. One of three math classes taught in l0w-income schools is taught by a teacher with out a degree in math or certification in math education
Read the report from the Education Trust here , and then write, call, or email your policy maker of choice and ask what they’re doing about this beyond requiring poor kids to spend more time taking math tests and then withholding their diplomas when they don’t pass.
Education and Class 
Just more evidence of the stack against them