How to Restore Data

How to transfer data from your original tablet to a new one.

Run a google drive backup on your original system (got to settings -> Data -> tap Backup)
On the new tablets, go to Data tab in settings. Tap Choose Account and log in with the same account as the original tablet (that you just backed up)
Still on the new tablets, tap VIEW/RESTORE. This will give you a list of backups. Choose the backup that you just performed and tap Restore.
Still on the new tablet, go to Devices and update the device MAC-IDs to the ones of the new system(s). There is an article here for this step.