Some possible ways to help: give teachers less class time and more time to prepare interesting lessons, pay teachers more, raise the standards of training and hiring.

See http://www.statisticbrain.com/iq-estimates-by-intended-colle... and note that, relative to other college majors, education majors tend to be dumb.

I also know a number who came from a humanities background, and "learned enough math" in the single, poorly taught math-for-teaching class they had in getting a masters.

One of these groups makes better teachers (and likely has a wider career path, because of the undergraduate degree).