Have a look at the windows 8 style, to get an idea of what might be a model for a touch screen; the actual company is a local Hampshire one who're doing a lot of interesting things.
Revision if you're not quite sure about Interaction etc,. Several refs in here are to wikipedia, so not academic, but good for background.
You'll need to either create an account, or just guest access. (Example of Moodle 1.9 course)