Don't worry The smarter you get the less paper it will take Just be sure to recycle the paper
Wut. Just recycle some old junk paper that you don't need and write on the back of those. Or use your body. Just don't stab your genitalia when you mess up around your crotch and stab down in frustration
maybe your hand? just wash with soap afterwards
chalkboards
I get assigned math homework online and i only need to submit my final answer via online.. but i work through the problems on paper. I consume a lot of paper because i get problems that take up a lot of room, I sometimes make a mistake and have to erase a lot, and i write big. So.. what can i write on that can be erased easily?.. other than whiteboards