In a school library I have 30 iPads to set up for teachers to use in their classrooms.

Apple has a tool, Apple Configurator, designed to help manage multiple devices in exactly this kind of scenario. I haven't personally used it, but it sound like what you need.

No - if you try to use one Apple ID on more than 10 devices without some sort of management software layer, you will end up getting that account locked. It's better to reach out to Apple (or a consultant) that does this to learn the benefits and drawbacks of managing a cart of devices.

If you wanted to ask a more specific follow on question or edit some details to make your situation a little more narrow (where in the world your deployment is based, what you've tried to solve the issue, etc..) it's hard to offer anything other than links to places to start doing research:

• http://www.apple.com/education/resources/information-technology.html

The link above has videos explaining various enrollment strategies, how to use the configurator, white papers, volume purchase information (which means educational discounts) and more.

For our iPad distros we are using two accounts:one Volume Purchasing Program account and one regular apple ID and Apple Configurator.

Example: [email protected] buys the VPP app codes from apple and I download the excel sheet with the redemption codes. Then I would redeem one of the codes on [email protected] to download the .ipa file. That .ipa file gets loaded into Configurator along with the excel sheet with all the codes(their basic license mgmt) and allows you to apply the profile(Prefs and Apps) to managed devices.