To me, this is a mixed bag feeling. On the positive side, I am always up on trying new ways of presenting information to students instead of totalling relaying on the traditional textbooks. There is so much information out there on a specific topic plus the information is always changing, particularly in the sciences. However, on the uncertainty/negative side of this issue, printing out the pdf files from a textbook can be quite expensive. This would cost the student tons of money. For instance, the printing could cost anywhere between $0.05 to $0.20 per page depending on if the page is printed in black and white or in color. Also, it would be a huge paper usage. A high school science textbook usually has about 500-600 pages. So, if the student printed out every page...the total cost for one textbook could range between $25/$100 to 30/120 (depending on if the pages are printed in black & white or in color). After the term or school year is over, what happens to all of the pages used? Thrown in the trash or recycled?