Check your email for a possible email from Staples Rewards with a free $5 reward coupon! I am enrolled in their Teacher reward program and received the email for that reason. The coupon required no minimum purchase and expires 11/21.
If you got the same email, check out some of the stuff you can get for free:
On sale for $5 (reg $11.29)
Pentel Wow 18 pk for $4 (Reg $9.99)
Expo Dry Erase Set – $5 (reg $11.49)