I use my iPad more and more as I teach, showing the students slides, videos, etc.
Having a words with friends, draw something, or email notification, especially with personal content in the first line, show up is always distracting.
I see that I can change notification settings per-app, but don't see a way to disable all notifications system wide. Disabling apps individually works, but requires a bit of effort and time, and isn't something that can't be done mid-lesson.
Is there a way to disable all notifications, then reenable them without fiddling with each one individually?