Before you hit the stores, scope out your inventory at home. You can save a bunch just by reusing supplies from last year. Check for binders that are still in good shape, practically full notebooks (just tear out used pages if there aren't many), pens, markers, rulers, etc. There's no reason to buy brand new stuff if last year's is still in good condition. Not only will this keep your shopping list shorter, but it will also be less waste, making your school year a little more green.