I use iPads with my class frequently, using a cart that we have access to. I have started to use QR codes more and more as a quick and simple way to get my students started with their work.
I have made a QR code for every blog that we read and comment on, as well as any other websites that we use regularly.
The children can then take their iPad off the cart, walk up to the SMART Board and simply scan the code that corresponds with the blog that they want to read.
I am also working with Julie Turner on mini-flipping our classrooms (her 1st grade, my 2nd grade). Our plan is to record very short small-group lessons, and make them accessible to student when we work in centers. These lessons could also be kept as QR codes in a folder. We can open the folder to the lesson (video) that we want the children to work with, and they can scan the code and get right to work.