Oh yes, checking twitter after the exam has become a bit addictive hasn't it?
I'm quite surprised to hear that schools are running last minute revision sessions in the hours before exams? Doesn't that risk panicking some of them?
One things which IS good these days is that there is such a lot of sharing of materials/revision resources from teachers and pupils alike (e.g. Mr Bruff!) that even if a student has a bad teacher or has missed work, they can find some way of catching up via YouTube etc. Yesterday DS got a bit sidetracked watching Christopher Ecclestone (one of his fave actors) reading one of the English poems!