If you are looking at setting up, managing, and deploying multiple iPads in your school, the the iOS 5 Deployment Guide walks you through configuration profiles, Volume Purchase Pricing, and deployment options. Thanks to iPad Academy for posting the link to the PDF.
Though this is not necessarily a post specific to the iPad, many of the suggested resources either have apps or can be used on the iPad via a web browser. There are some interesting concepts for ELL/ESL or even foreign language learning.