I have been extreme couponing for a few months now and am surprised at all the different places that you offer printable coupons. Well, I just discovered one more! BoxTops4Education has coupons. Click here for the link. The bonus is that all of the items you can purchase with the coupons have the BoxTops4Education on them that you can turn in to help raise money for a local school.
Even if you home school you children, I'm sure you know someone that could use them!