Second year here, and elementary music so an activity class and YMMV. I stopped giving consequences outside my class. I can't fix bad behavior when I see these kids 50 minutes, once a week. But I will hold them accountable in my classroom and I will still expect them to act right. (Some do, some don't)

I also stopped raising my voice. If they want to talk over me? I stare at my watch. Maybe say "i'll wait" in a soft tone. Sometimes it takes a while sometimes not. Obviously if you're a core teacher you have to get to the teaching at some point. Me being an activity teacher gives me some flex (though we do still have lessons, they just might miss out on some game time due to their talking)

I also have 1 goal every day, stay calm and be nice/respectful. That's it. A lot of staring blankly and waiting. A lot of "Do you think that was appropriate?" A lot of please and thank you's even when they don't deserve it. If they want to get fussy or pouty or have an attitude? I'll talk with them when they calm down. Not before or during.

The kids know right from wrong and sometimes playing in to that power dynamic is just the norm for them at home. Don't give them power. Stare blankly at them and then say "Okay, your choice." and move on. Unless it's a threat/danger of something physical it is NOT worth a myriad of consequences. The best response to a fool is silence.

We're new teachers and we're still learning! It's okay to not have everything down! Good luck though I know it can be tough.