For schools that have lots of iPads, IntoScience recommends using the free Apple Configurator OS X App. It is possible to download the IntoScience iOS App once to an OS X based computer and then distribute to multiple iPads (up to 60 at a time) using Configurator. The App can also be used to deploy network configurations and to apply user restrictions.
Deploying the IntoScience App using this method will save on bandwidth and install time when managing multiple iPads.
Article on using Apple Configurator:
Link to Apple Configurator App on iTunes: