Forced to commit shirk at school

Hey so I have 2 problems: 1.in one of my subjects, we have to organize something for this years halloween and I have to participate too. We’re gonna go to 3rd graders and teach them halloween vocabulary. And as far as I know, halloween is a shirk/pagan holiday.I am extremely uncomfortable with the whole situation but I’m obviously not allowed to not participate, will I be held accountable for this? 2.in another subject, we’re gonna watch a movie soon and I did some research because I was curious about the content, now I saw that there is gonna be music (obviously) and even shirk in the lyrics. I don’t know what to do since I can’t just stop going to school and my parents wouldn’t allow me to stay home, but if I watch the movie knowing that the songs in it have shirk, will I be held accountable? I would want to stay home for all the lessons that we watch movies but I can’t.