Push out extensions via Google Apps for Education:
Log into the Google Admin console.
Go to Device Management > Chrome > User Settings
Scroll down to the Chrome Web Store section and select Manage for "Recommended Apps and Extensions".
Select the Chrome Web Store and search for and select the extensions that you want to add to the user's profile.
For additional information about the Admin Console see Chrome for education Help
Create User Accounts & Permissions
Easiest Solution! Fill out our District-Wide Domain Request Form
If you have Proxy / Firewall filter in place you may need to Whitelist URLs.
Add the wildcard URL, *.donjohnston.net to cover sign-in and data sync.
For additional information on deployment and whitelist/permissions see help.donjohnston.net/it-resources