Do you find that most schools provide a stash of big books for use in K-2 or have you had to buy a lot of your own? In the school I student taught in, the school had provided literally hundreds of big books for the K-2 classrooms. You could just take the ones you wanted and then return them when you were done. Is this typical, or are those teachers just really lucky? Also, how much do big books usually cost? And where do you buy them?