ABC Teacher
Offers discount school supplies

Academic Superstore
AS offers products that can be used in the classroom at great, discounted prices.  This website offers a wide variety of products and you should be able to find anything you need.

Barnes & Nobles
Offers a 20% discount off the list price of hardbacks and 15% off that of soft cover books. Other non-sale items may also be bought at a discount. According to customer service you will need to ask for details at your school.

Borders
20% off all purchases made in the classroom.  You must prove that you are currently teaching with a paycheck stub or any other form of verification.

Books Warehouse
Books Warehouse offers a 15% discount to all educators with proper identification.  You can look up all the latest books you want for your classroom at great rates!

Dell Computers
Dell does not offer the largest disounts, but they still offer some discounts.  You can receive 2-4% off computer systems and you can receive discounts on software and other items.  Contact dell for details, but be aware you will need your school identification number and name to receive the discount.

National Science Teachers Association
Sponsored by the National Science Teachers Association and the FDA for Middle and High School students. Curriculum Science Kit and Our Food Supply
 
Software Express
You can receive discounts of up to 75% on products.  Browse the website and talk to an employee to see what you can get discounted.  A valid faculty ID or letter from the principal with a proper ID are necessary to receive the discount.