Back to school donations

There is always a need for school supplies for low-income families and so there's always drives. While Target and others often benefit from said drives by offering their stores as a dropoff site and putting together tidy packages of the basics for altruistic consumers to donate, why not also offer to collect used supplies as well? I knew a ton of kids, including myself, who unnecessarily bought new supplies pretty much every year, but we'd always end up throwing away old stuff that was still in good condition. Just a way for brands like Target to do a little more good without necessarily making money off us (though I'd think the feelings of goodwill towards the brands would end up translating into sales anyway.)