One question that always comes to my mind is how people used to learn when there was no internet. I can't compare but it would definitely was the toughest work. In present time, if we fail to understand something from the book, we immediately take the help from the web. People now days are so busy that they don't even want to make an effort to type through a keyboard. No problems. Korean company brings to you a Dixau Text Scanner that has a little camera over it. It reduces your burden to greater extent.
It was designed for the Korean student but is also useful for others as well. This device is available in the Korean market. The best part of this is that you can use it anywhere. Even in the middle of the classroom.

How it works:
You only have to be next to the computer. The camera takes pictures of text, recognize the characters, and then provide on-screen explanations via search engines. It then finds the detailed explanations in your PC with the help of text recognition technology, and reveals them on the monitor.

This device will cost you around $90.