Teachers Pay Teachers is having a huge Cyber Monday Sale. The site is running a 10% off sale by using the promo code CMS28. Just use this promo code at checkout. Many top sellers are also running sales in their stores with as much as 20% off. That can give you the customer 30% off of many items. My store will be at 20% off on Monday November, 28th and Tuesday the 29th so stay out of the malls and happy shopping!