Once upon a time, my pupil was nine years old. We were doing work in a math book and as far i remember we reached page 40. This kid was still at page 9.
I asked him how much homework he should be dealt so he could catch up to the rest of the class. In the beginning he said 1 page, and I laughed together with the whole class. I asked asked him if he was serious. Then he said: "Oh no I was joking, just give me half a page in stead"
Then i remember i laughed so much that I hit the ground. That day is now five years ago, i do not work there anymore - but sure is that I will never forget that moment.