Teaching is still the same, everything else has changed

I am in a new school district and at times I feel as if I have changed professions.
My classroom is still just that, my classroom, but so much around me has changed. There have been a few times, I admit, that I have wondered if I am good enough to teach these kids. They are different. Yes, they are still teens, but honestly, they are different from the students I have taught previously.

The protocols around me are different. If I can just get a handle on the changes, maybe I will feel more settled in. I don't know.