[cackles into the depths of hell]
At the beginning of my AS year, I barely put enough hours in to do my homework (normally copied it off a friend, oops). I took a better attitude later in the year where I'd.... just about do my homework. It was only in hardcore revision mode about a month before exams where I'd match my lesson hours to out of school hours.
A2 year, so far I've put in enough to do my homework, read ahead for Biology and put some work into self-teaching Further Maths. It's still nowhere near matching my lesson hours. For the nine hours of teaching I get a fortnight, I try and do about two, maybe three hours out of school?