I've been a public school teacher for 39 years and I approve this message. Great post!
My very first job was at a middle school. There is a special place in teacher heaven for middle school teachers, and I was NOT headed to that special place. Luckily, I got a high school job after one semester.
It takes a very special teacher to navigate all the different maturity levels. (Search Matthew Bates on Medium and Quora for more on this. He's excellent)
Cell phones, get rid of them right now! Not one kid needs more time staring at a phone. Not one.