I swear I'd go nuts without my $7 paper cutter I bought last year. I print a lot of things 50% and then cut them in half to save copies. I also use it to cut center pieces and word lists for the kids. I also can't live without Post Its. I must have a 20 pads, in all different sizes. Today I bought a laminator (been wanting one for years!) and I have a feeling I won't be able to live without that either. What "little things" do you feel you can't teach without?