I just finished watching The Wave (2008).
Since it's a foreign film, I doubt anyone has heard of it. My apologies if you have. The Netflix blurb says: To give his students a real-world example of how dictatorships can grow powerful, a high school teachers conducts a social experiment. It was nothing like I thought it would be. I was expecting the teacher to be a power hungry, megalomaniac. Not the case. He was just a unconventional teacher. But the movie was really good and I was riveted. I notice that I pay closer attention when I'm watching foreign films because there is no way I can surf the web, or read or do anything else and still understand what is happening (I can multitask like nobody's business).
It's a drama with some thrills. I wouldn't call it a thriller, but I did keep wondering what was going to happen. So if you like foreign films then I think you should watch this. I can't stand dubbed movies, but if you don't mind them and can find it dubbed, I think you should definitely watch it.