Here are the directions as to how staff members can download apps onto their school-issued staff iPads:
*In order to download apps, you must first make sure you are logged into the App Store with your personal account (Not your school Apple ID).
On the iPad, navigate to Settings --> Apple ID, Cloud, iTunes, and App Store (First thing at the top of settings) --> iTunes and App Store
If the Apple ID listed at the top is your school account, click it and select "Sign Out", and then sign in with your personal account. You can now download apps from the App Store. (If you don't have a personal account, select "Create Apple ID" and create a free account to access the app store.