My H.S. daughter's got an AP English teacher who had a student aide grade their last essay test -- and he refused to commit that this wouldn't happen again -- and a far left-wing AP Civics teacher. You bet I'm for Prop. 74!
Two years is simply not long enough to offer public school teachers tenure. Under the new rules, the AP English teacher would not yet have been there long enough to have tenure, and our complaints might actually have some effect, and there might have been enough time to discern the Civics teacher's inappropriate teaching methods before he was tenured.
Any teacher worth their salt has little to fear. One of the "scare ads" airing on the radio suggests that a principal could fire a great teacher parents love. Which begs the question, why would such a teacher be fired? Occasionally you might find a bad situation with an unfair firing, but "office politics" are part of any career. There's no reason that, unlike other professions, teachers should have special protection after only two years on the job.