Right now you can get $5 off $25 on Amazon.com when you allow Amazon to post on your Facebook page.
Amazon wants you to share your back to school shopping list. Just answer the question and click share. The $5 will automatically come off you next $25 purchase.
Upon completion of the "Share & Claim" action, a $5 off $25 or more promotional credit will be automatically applied to your Amazon account. Promotional credits must be redeemed by 11:59 PM PST on Thursday, August 22, 2013. This promotion is available to customers located and with billing addresses in the United States. Limit one promotional credit per customer. Quantity is limited.