Standardized testing has also restricted teachers to standardized teaching. They must complete X number of units from the binder every Y number of days. This leaves little time for the teacher to come up with their own lesson plans. I think there needs to be a balance between a teacher's autonomy in the classroom and standardization. I've heard many teachers complain while I was in school that they felt like they don't have the time to focus on the things they want to do in class. In my elementry school, the class would go to a different teacher for either STEM or liberal arts. I think this is a good start since because teachers can solely focus on material that is related, they can tie in lesson plans and make sure that the standardized subjects are taught efficiently to leave time for the other topics they want to focus on.
I remember in middle school, I had a couple teachers who would say "ok, this is the standardized stuff I have to say" and then go into a very boring lecture of what we just had been learning except the way we first learned it was interesting and engaging. They were simply dotting their i's to make sure that they did their job in conveying the material the state wanted us to know.