It takes a few years to get tenure. Also, note that teachers sign an employment contract for each year they teach. This means that the administration has 3 chances to simply not renew a new teacher's contract if they don't like them.
So, it's only difficult to fire teachers after you've had them working for you for a few years.
And even then, the district can make your life miserable without firing you. They can have someone from the central office sit in and observe you every day. They can give you a lousy schedule, give you too many preps, move you between crummy rooms, or a number of other things to get you to leave.
It takes a few years to get tenure. Also, note that teachers sign an employment contract for each year they teach. This means that the administration has 3 chances to simply not renew a new teacher's contract if they don't like them.
So, it's only difficult to fire teachers after you've had them working for you for a few years.
And even then, the district can make your life miserable without firing you. They can have someone from the central office sit in and observe you every day. They can give you a lousy schedule, give you too many preps, move you between crummy rooms, or a number of other things to get you to leave.