We have a ward (church) email list where people can send out requests/offers/etc. A while back I put out a request for paper that had one blank side, and since then I've had people periodically drop off sizable amounts of one-sided paper. When you homeschool AND have a prolific artist in the house, you can't have too much free paper! It really has been a great blessing. Right now I'm printing off these beginner books for Spud and am using one-sided paper. I'm planning to get them spiral bound but figure since my printer really only does one-sided well, I might as well save on the paper cost.