Today through Tuesday, Sept. 4 Office Max is offering teachers 25% off their entire purchase with this printable coupon.

This discount applies to regular, sale and clearance priced merchandise — so stock up!

Exclusions include: postage stamps, TVs, printers, computers, monitors, eReaders, tablets, projectors, shredders, typewriters, cash registers, hard drives, gift cards, prepaid cards, phone cards, FedEx shipping services, Design Center Kiosk items, desktop publishing services, custom stamps, awards and plaques, Virgin Mobile devices, Ctrlcenter services, MaxAssurance plans, and OfficeMax essentials kits. There will also be no rain checks.

That still leaves most school supplies eligible, though!

You must be a Max Perks for Teachers member to get the deal, but you can easily sign up here or in stores. It’s also a good idea to bring your school ID.