Here is a link to a site that provides PDF documents on how to work within the iPad app, Pictello. Pictello is a great app for creating customized social stories for students as it allows you to record voice over and upload photos directly from your iPad's camera or photo library. You can find some information about Pictello here and here.
Special Education Technology is a department of the Ministry of Education in British Columbia, Canada. It has a website that is a comprehensive resource for anyone looking to find materials, information, and resources to do with special education technology.