I just found this website, http://www.ed.gov/pubs/edpubs.html, that has tons of free items. Some don't even require postage! I just ordered a totally free reading and writing Arthur poster for a fellow elementary teacher. I also found that my local video store often has free promotional posters and they just throw out old displays. I ask for the displays right before recycling night. I use the display cartons for book reports and even dioramas.