Use VPP. Select an MDM. Read the google doc below.
IT Resources -- ios & OS X -- This is a fantastic web page. I like the education site over the business site.
View documentation, video tutorials, and web pages to help IT professionals develop and deploy education solutions.
business site is:
Excellent guide. See announcment post -- https://discussions.apple.com/thread/4256735?tstart=0
good tips for initial deployment: