I'm never heard of a middle school offering trigonometry or calculus. The rare kid who is ready for those topics by age 13 can be accommodated by allowing him to attend that class at the local high school.
A middle school algebra teacher should of course understand middle school algebra. This is not an unreasonable expectation for a job that requires a college education. If a teacher lacks the ability to master middle-school algebra, how on earth did he get into college?
A middle school algebra teacher should of course understand middle school algebra. This is not an unreasonable expectation for a job that requires a college education. If a teacher lacks the ability to master middle-school algebra, how on earth did he get into college?