Tell her to spend the year getting a master's degree in mathematics. At that point, she is eligible to teach at a two year college. I have a high school teaching license in science but after 1.5 years I gave up for pretty much the same reasons. Because I have a master's degree in physics, I started teaching at a community college. So much better! The students grow up over night, you don't deal with parents regardless of the students age, and you can kick any trouble makers out of the class. I'd never go back to a high school! Lots of jobs for math at two year colleges.