kylbdnr-same here.
I went to a school where half my class were Ashkenazim and half my class Sephardim. The school itself was a big mix of Sephardim and Ashkenazim. Every class had atleast 4 students that were Sephardim and the class was no bigger than 9-15 students (it was a fairly small school).
So, during halacha class the Rebbi was Ashkenaz and therefore taught us Ashkenaz halachot. For me I thought it was a waste of time being in class since most of the halachot didnt pertain to me. Whenever he would teach us something I would get very annoyed because it was either something something that I dont do, or it would be a topic very intricate and my whole class were hearing of all kinds of “new” halachot and I would never be sure if it pertained to me or to the rest of the class. The teacher made no effort to mention that a certain halacha was only for Ashkenaz. I would always try to “stir the pot” and ask “so what about sephardim, do we also do this”, (even though I knew we didnt). The Sephardim in the class were either clueless or werent even paying attention to the class since they didnt care.
But, I did care. I was going to school because I wanted to learn. Yet, I dont think I gained much from that class. It was VERY frustrating and I would always have to go home do all of my homework from school (which was plenty) and then late at night take out the halacha book and start learning. And then dont get me started with testing… When we had a test and one of the questions would be “Are we alowed to do xyz?” I would write “no”, even though I knew that for Ashkenazim it was “yes”. And when I got my test paper back I would always get a wrong mark.