I always sit at the very front at classes that I'm interested in like Biology and Physics. I also therefore tend to get better marks in them.
Classes that are important, but I find it hard to stay focused on like chemistry, sometimes Math when it gets boring (algebra that is), Latvian (hate that class), Literature etc. I just sit at the middle desks. This is where I always sit, when I'm not sure about my capabilities in that particular subject.
Boring classes where I probably know more than the teacher like Economics, English and my Business stream related subjects such as Etiquette or Management I always take the last desks, rarely pay attention, draw, surf on the internet or read, but i still manage to get straight As, so I don't feel like I should bother following anyways.