I never paid board but I moved out at 17 to go to uni. While I lived at home and was at high school, I got a casual job when I was 14 and a half. I saved $50 a week from my pay and the rest was mine to spend on entertainment (usually $30 extra).
Mum and Dad paid my rent while I was at uni, while I used my savings to pay for my Uni textbooks and fees. By second year at uni I had a part time job which I used for entertainment, food etc. I didn't receive anything from Centrelink.
As for my DD, I probably won't charge her board while she's at high school and probably won't charge her while she's studying full time at uni (well, if she does go to uni).