Typing in websites can be very time consuming for teachers trying to have students visit various websites. One of the apps that I have been using for a few months that is very helpful is called QR Journal. It is a free app that you can download from the App Store.
What I've done is pre-printed some of our most visited website that we use in class. During literacy tasks, when students go to the technology station, they are able to choose the website that they would like to visit. To use the app, all the student has to do is hold up the card with the website's icon and QR Code, the computers camera takes a picture, click on open link, and it will easily take you to website.
I told our technology teacher and she has been using it in her classes. Imagine saving all that time by not having to enter in web addresses to each computer. Bookmarking sites is alright, but simply holding up a QR code to the iSight camera is so much easier.