Bleh I only have good marks at what I like. English, Romanian, Chemistry, 9s and 10s just because Mihai likes. As for Maths, Physics and other silly stuff, a 6/7 is more than enough.
Anyway I'm not proud of this or whatever, since I'm aware of the fact that grades are irrelevant and don't show how smart someone is, especially not in this country. >_>
As for the guy who started this thread, well I guess I could give a few tips. First of all, in your situation it's important to pass, even if it's with crappy grades. To do that, you'll need to study or just pay attention in class. I survived for more than 4 years while not wasting a single hour to study at home, and still got above average grades just cuz I bothered paying attention. Improve you grades progressively, start out with things that are less gay (should be easier for you) and finish with the tricky ones.
As for motivation, I'm not sure. Try doing something pleasant before studying like sports, or playing games or whatever floats you boat lulz. Been proven that if you let a child play for half an hour, he'll be in better shape to study after. If not, just quickly read whatever you have to read 5-10 minutes before the classes start and you should have no problem passing; works for me, has to work for you as well.
Good luck.