Need graph paper?

Go here. As the site author says: "You just used your last sheet of graph paper, and you have plenty more work to do!" And it's free- but you can make a donation to help the site author if you want.

(This was a Godsend for me today - I realized my 1 pm class will need graph paper, and lots of it, and I only have maybe 50 sheets left. And I can't very well yell at my students for making graphs on filler paper if I don't have graph paper to give them).