Is there a maximum number of devices allowed on a Google Play Account? Many schools are looking at using Android tablets in classrooms.  Some have classroom sets of 35-40 tablets.  As a means to manage apps, having them tied to a single Google Play account would be ideal.  Is there a maximum number of devices allowed?  

This setup would also be cost effective, if the school uses any pay apps, as the app is linked to the account, not the devices.  Does anybody have any experience or knowledge beyond, "I have 5 devices in my family all synced and it works."?
This applies to Music, but seems it also might generally apply to all Google accounts regardless if they use Google Music or not.


  Any user can associate up to 10 devices to his or her account.
  ...
  We limit the number of times you can swap out new devices at the request of some of our music partners in an effort to limit abuse.


But you may also run into an issue if there is a credit card associated with the account used to purchase apps - any student could purchase whatever from the market.

If you're serious about doing this, and you didn't make it very clear what you're actually wanting, you might want to consider contact a device manufacturer and setup a contract to create tablets specifically for your needs.