The math specialists should be teaching math in k-5, not in high school.
Most of my time teaching (high school) was spent undoing misconceptions.
The students would have been better off if they had been taught nothing (about math...).
I brought this issue to my old man (30+ years teaching), he concurs.
/rant on/
I never understood the benefit of having students do massive repetitions on an excercise they don't yet understand, and then just moving them along to another concept which itself requires comprehension of the previous (misunderstood) concept.
Practice makes permanent (especially the errors

).
The root of many problems in the public education system can be traced to this:
It was designed for the industrial age.
The industrial age is over.
/rant off/
The public indoctrination system didn't mesh well with my oldest.
Learning from this experience, I part with a considerable share of my income to put my younger kids through a private,
religious school.