I'm not a teacher anymore because I wanted to spend time in the evenings and on weekends with my children, instead of doing clerical work like marking homework and entering grades. You'll notice that I'm not citing the students as a problem, and I never would because they were rarely the problem. I've seen many good teachers at bad schools succeed, but I've never seen a bad teacher at a good school succeed. Our schools are like an army whose best soldiers, year after year, are deserting. Give teachers secretaries or teacher assistants.
College professors have teacher assistants.
A lawyer, a doctor, or an accountant has a secretary. Reduce the workload. Most schools have six or seven periods and the teachers teach five or six classes. Any teacher would be far more effective teaching three or four classes, instead of five or six. Just as my departure hurt other parents' children, the problem has now come back around to hurt my children.