The latest Google update alert gave us the exciting news that Google Apps administrators can now define how long your various suborganizations will retain emails. You’ll be able to say that deleted teacher emails are kept for ever, but deleted student emails are only retained for a year.
This would be some very exciting news if it were free. It isn’t. You’ll need to have the Google Vault app which costs $5 per month/user. For a school, that’s pretty pricey. For now, administrators will still have to manage accounts manually.