I believe that there should not be any replacements for textbooks because they are very useful and provide the correct information. Unlike textbooks, tablets and handheld devices have ads that can easily distract you and lose focus if you study. Also, if the power went out and you had no internet or service, you will always have textbooks to help. Not only do tablets and phones get stolen, but they are very difficult and expensive to replace. Also, if you are using your phone as a resource, people will be messaging and texting you while you work or study making it harder to concentrate. True, textbooks are heavy and all that. But when phones break, the bill is heavier.