I just didn't go. I was always the last to leave the house in the mornings and the first to be back in the afternoon meaning I never got discovered by family. The school used to give out attendance reports which I disposed of so my dad never saw one of them. The school hardly ever phoned up to ask where I was, I think I got my sister to pretend she was my mum once when she phoned in to say I was 'sick'.
College was a lot easier, they just didn't care. They used to use the "We don't care if you skive off but it's you who's going to lose your EMA" excuse. Wrong, I don't get EMA so it doesn't effect me in the slightest :p
College was slightly more difficult to skive off. My sister was last to leave the house while I was at college, I used to leave an hour before her generally, but she was never bothered if I didn't go to college. The afternoon was the problem because my bus got back at 4:45/50 and that's about the time my dad used to get back from work, so if I was already home at that time it'd look a bit dodgy (bus stop is 10 minutes away). So I made up the reason that my friend gave me a lift back from college. Three days out of five I only had half days so it was pretty easy to lie about.