Where can I donate old college text books?

By “old”, I mean around 2–8 years old. I’ve tried the local library, but they don’t accept donations since they have some strict book binding requirements. Donating to the local high school is an option, but the relevant teachers aren’t there for the summer. Most of these books are in decent condition and I’d rather they were used by less privileged kids that are trying to get an education instead of going to the dumpster. Books range from SAT preps, to MCAT preps, Bio, Ochem and everything in between.

I do want to donate somewhere locally so I don’t have to worry about shipping them (they are ridiculously heavy and shipping them would be quite expensive). I tried googling “donate books” in my area, but nothing of value came up.

Thanks!