I have a project for school, and I'd like to know about Eastern European education. Could someone tell me?

Like, tell me about the grade separation and subjects that are learned. But just one of those would be fine. I don't have to turn this in, i just have to talk in front of the cl if that helps any. My countries are Poland, Czech Republic, Slovakia, Hungary, Romania, and the Balkan Peninsula. Thank you everybody, I appreciate your help!