Office Max has bonus coupons available on their site. You do need to register to receive their newsletter to access the coupons. You can print the coupon page and bring into your local OfficeMax. Included on the coupon page is a coupon for free Sharpie Highlighters (5 pack). Offer available while supplies last.
If you watch the ad inserts and previews online, you can slowly but surely get most of your school supplies for free or cheap. Start gathering now!