> A middle school algebra teacher should of course understand middle school algebra. Yes. Exactly. > If a teacher lacks the ability to master middle-school al

> A middle school algebra teacher should of course understand middle school algebra. Yes. Exactly. > If a teacher lacks the ability to master middle-school algebra, how on earth did he get into college? Knowing a subject well enough to pass a class or pass a test is not the same as knowing it well enough to teach. STEM in schools is a real problem because, well, non-education jobs pay 3-5x what teaching jobs do for math, CS, and robotic.