McGraw-Hill, Pearson Education, and Houghton Mifflin Harcourt -- the publishers responsible for the majority of K-12 content in the US -- have created Multi-Touch textbooks available now from the iBookstore What can we infer from the passage?
Some things don't get better with age, such as paper textbook.
The students can use ipad freely.
i Books are sure to replace the paper textbooks.
We should pay little attention to the backpack weight.