Apple has produced a number of guides to how various apps can be used in the classroom. You will need iBooks installed on your iPad to read them. Some of the guides that you might find particularly useful are:
Tools for Formative Assessment
Discovering Educational Content for the iPad
The beauty of these type of resources is that you don’t need to go on a training course to utilise the apps and techniques – you can access what you need and at your own pace (an indicator of how we will develop our use of the iPads with students in the future.)
You can see a wider range here