[cma]

What could possibly go wrong with implementing a complicated biometric fingerprint scanner based system for our schools?

http://news.ycombinator.com/item?id=1221068

[olefoo]

Well card swipes are obviously unworkable. You could maybe link it to student's mobile phones...

But the real solution is to have decent schools with classes small enough that the teacher doesn't have to take roll call because they know everyone.