Are you seriously asking this question? Surely there are certain things like different levels of strictness in countries' school system, but well behaved students that like to work with their teachers can be found everywhere. If they don't see the reason in studying, it should be your goal to encourage them, shouldn't it?
Well, if you want students trained to politeness, I hear that Asian countries have a reputation for that. I also think that students in France have to be very dedicated to work to pass into a lycée, so maybe you should try getting into a lycée ;)