Drop textbooks completely from K thru college. Give every child their own laptop, like the laptops from One Laptop Per Child (http://laptop.org) and use cloud computing & the internet.
They could be Ipads, laptops, netbooks - anything that they can access the internest with. Set up a partnership with ereader companies (eg Amazon, B&N etc) so that any textbooks needed can be accessed in e-format.
Every 3 years, the kids get a new computer, an upgrade after they turn in their old one.
Computers promote interactivity with assignments as well as cutting down on the cost of physical books and the cost of trees.
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