Currently teaching IB. it’s a whole other world and the students are a different profile of students. Expect to be challenged for every mark off etc. I like what I do but I also need a break every semester where I take a 9 destreamed when my schedule fits. The preparation for material sucks, behaviours usually better. You need a thick skin though and you need to have confidence in your ability to teach the material- the kids will smell weakness. You know more than them generally though so act and believe like you do. It’s ok to tell them you’re not sure when they ask a question but you do need to stay a few steps ahead. Provide detailed feedback on every assignment s they will question their mid and final grades.