Save the trees!
Save the trees - we need the oxygen as there are so many of us. Save on your child's medical costs from injuries through carrying around heavy backpacks full of paper. Best idea ever.
It pays itself off before you know it and the data it contains, is never out of date. Only issue is quality control but you have that with book printing too. Some paper-based school books are way outdated.
Just observe the environment at all times please - there is only one Earth.