@I also go to a catholic IB school and I must say that religion is not often integrated into my courses. Like I said earlier, my school is Catholic so a lot of the students abd teachers there are too. Often, we into debates about religion and its impact on us as people in TOK for example but it has never prevented us from learning what needed to be learnt. I would suggest talking to your teachers about this problem and hopefully, they understand your point of view. If not, you should probably get yourself study guides to keep yourself up to date and informed. Hope this was helpful.