I didn't...
I spent the majority of my lesson time; asleep, dicking around or not in the lesson (A lot of the time not even on school grounds)
Heck the only reason I managed to do any of my coursework is because my teachers kept me in after school and made me do it then... (Or I did it as part of a detention during lunchtime)
Looking through my old school books they are really crappy for actually learning things from, since they either only have work written on the first page (My French, Spanish, Biology and a couple of my Chemistry books), are filled entirely with doodles (My RE, Math and English books) or are filled in with exactly what was on the board so I can't even decipher it as it is not written in my own words (My History books, since the teacher made me write everything down to revise from... Which I never did)
I'm left slightly confused about how I did so well at my exams, since I basically went through middle school thinking I was an idiot then got into high school and just knew everything when I was asked questions (Or given one of the hundreds of exams I had to do (I'd be given 5-10 exams per week because I was in the top classes...))
Now in college I've got a different system, I half pay attention to my tutors (I spend more time talking with my friends, getting in trouble for talking and being punished by either being sent out the lesson (And forfeiting the money I'd get that week for being in all my lessons) or given push ups) whilst also writting down brief notes which can be accurately described by most people as "Gibberish"
So far it's currently a working system, I do make some people jealous as they try quite hard to pay attention in lessons and then can't understand what was said whereas I seem to just absorb information without trying...