I thought that might have been what you meant, “tenure” not “10 years.” lol
In AZ we did away with tenure, UT might have done the same.
I am not sure no tenure is a good thing. I have seen small school systems operate on the basis of who you know, political clout, and relationships, rather than on quality. I've seen a very good school teacher fired because the police caught a school board member's son rolling (tp) that teacher's yard. The teacher didn't call the police, the only punishment was the kid had to clean up his mess, but the teacher was fired nonetheless.
There is abuse in both directions. Usually on this topic I am quiet because I do see the difficulty in removing bad teachers. There are good reasons for tenure and no tenure.