Many years ago, I had an unscrupulous high school algebra teacher, and the misfortune to have him the last hour of this day. His passion was horse racing, and his deal with the class was this:
He would give us a bunch of problems to solve, breeze through the basic concepts, and then take off for the race track. The understanding was that we wouldn’t squeal on him and everyone would pass. Somehow, he got away with this.
I have no idea if he ever got caught. Now most teachers aren’t like that. For years, I was married to a woman who was ranked one of the nation’s three best AP History teachers. Nor are teachers the only factor in educational achievement, But finding a way to distinguish good teachers from bad is important, and the Michigan Council for Educator Effectiveness has just submitted new recommendations I think are worth considering.