So, for context, on Wednesdays at our school, we have this thing called 8th hour. School lets out 1 hour early, and we have about 1 hour until buses arrive. That one hour is called 8th hour and we can use it to do homework, basically do whatever.

In the morning, my friend asks me if he can play Smash Ultimate against me in the morning(I usually see him in the orchestra room every morning). I said yes, but I got there late and wasn't able to. So I just told him I could play during 8th hour.

So, come 8th hour, and it seems like there's a mock recital for the Solo and Ensemble performers going on in the orchestra room. Friend is still there. The orchestra teacher is giving tips on everything the performers need to fix, etc. So, I was wondering if I could still play on my Switch if this was going on? I saw multiple people on their phones and there were some people talking as well. So, I decided, if I turned the volume down and didn't talk loudly, it would be fine. So, I start the game. We played through one performance. It didn't seem like we had affected the performance in any way, and the orchestra teacher didn't notice as well. No one had called it out either, so I thought we were in the clear. But cue halfway through the second performance(we still hadn't said a word), teacher sees it, gets mad, and confiscates my Switch until the end of 8th hour, meaning I couldn't leave either. I still don't get why it was a major issue, because it had already been about 10 minutes of playing before she confiscated the Switch, and we didn't make any noise, and neither did the Switch. Not only that, she seemed to be okay with people being on their phones. But, I can see where I'd be in the wrong. So, AITA?