As a full time teacher I was teaching 10 different subjects at different paces working 35-40 hours a week on 3 hours of prep time year round and was barely making $45,000.
Management style here is very authoritarian. There is a union but management takes little to no input from teachers.
Teachers are currently considering going on strike. That gave me a clue as to how dissatisfied they are.
The main concerns are:
1. consistently flexing schedule where you are not sure what each paycheck will look like or what classes you will teach
2. no paid federal holidays (although the union was able to negotiate pay for winter and spring break but this only pays out for teachers who have been there long enough because they calculate your winter/spring break pay based on hours worked over 1 year)
3. High micromanagement from administration they send disciplinary action for the smallest things like logging an hour mistakenly
4. Bare minimum curriculum - they'll claim that having a textbook, study guides, and test is enough curriculum for a course and you shouldn't need prep with those materials
5. Low prep time and tons of control over how/when you use it
6. High teacher turnover