Returning to school can be an expensive time so a gift from you with a back to school gift certificate will always go down well. Obviously any monetary value is a great help but how about creating a gift certificate of your time such as doing some drop offs or pickups. Maybe create a certificate or voucher to offer some study or homework time.
If you run a business that provides items for educational establishments or perhaps uniforms and kit then how about promoting your business during the back to school time.
Use these free printable templates to produce some discount gift vouchers and gift certificates. They are high resolution so can be used as *artwork for a print shop or you can print them individually from your desktop.
All the text is editable so you customize them to suit your business entirely. Perhaps if your operation is new to an area then a discount coupon would be a great way of getting school parents into your store, especially during the back to school push.
*(Always get your print shop to verify the artwork will print to your expectation before printing)