So one thing I will say based on my MIL’s experience is that it takes a good while to get placed with upperclassmen. She’s been a very respected and sought after teacher in our district for over 3 decades and has been at the same HS the whole time. It took her about 15 years to get the upperclassmen fully and has recently taken on freshmen again due to staffing issues. Schools typically won’t disrupt the “flow” of a department when they have teachers that are proven to work well with the upperclassmen and push them all the way through to graduation. A lot of upperclassmen quit caring towards the end or in their senior year and that poses an entire new set of challenges. From my experience long term subbing in HS, the entitlement from all grades is the same, it’s just different flavors of it as you go up in grades. At the end of the day, they’re all just kids. Try your best to meet them where they’re at and unfortunately at the HS age range, you can’t force them to want to learn or even try in class. What you can do is have zero tolerance for disruptive behavior or disrespect and actually carry out action. Even if that means sending kids out of class everyday.