I have a book chock full of these kinds of bloopers! I'm not a teacher, though I have worked as a classroom assisstant before now - and you also hear some really really ridiculous things from the kiddies (especially the really litle ones, of course) but you can't laugh in front of them... it's the kind of thing you have to write down and then take home and share
There is a complete lack of English knowledge... ranging from spelling, to grammar, to well... I'm not sure what some of them were thinking, if at all!! But you know what it's like in an exam situation!
I do love the bit about people catching bubonic plague from inflected rats and growing boobs on their necks!! "Inflected" men would have had a field day, perpendicular or not!!!
Hrmn... it's obviously not "sheik" to be educated these days though......http://www.butlerwebs.com/jokes/kids.htm
This is the kind of thing I had to listen to in a day!!