A handy feature rolled out in Tableau 10 is the ability to subscribe to email notifications whenever a Tableau extract refresh fails. This can be really helpful if any of your reports rely on Tableau extracts - if there's ever a failure, that means data in the report(s) will be stale, and it's usually good to notify your end users (e.g. teachers and school leaders) proactively.
Here's more information on how this feature works: http://www.tableau.com/about/blog/2016/6/extract-refresh-fail-get-email-alert-tableau-10-55661
From Tableau's documentation, it looks like this feature is on by default. When enabled, owners of workbooks and datasources - as well as site admins - should receive an email when scheduled refreshes fail. Site admins can opt individual users out of the subscription.
Have questions or feedback about this feature? Please share your thoughts in the comments below!