The trouble (or is that bonus?) of having a very observant four year-old is that he spots all your "mistakes". He also spots everyone else's mistakes too! Perhaps I should offer up his services as a proof reader to all the teachers whose products I buy via Teachers Pay Teachers :)
I recently put together a pack of subtraction worksheets aimed at year 1/2 or Kindergarten/1st Grade kids. Small is currently "testing" these for me and out of the three sheets he's done this morning, he's noticed that a few of the sums appear twice. He's taken great delight in pointing this out to me, saying: "They've made a mistake Mummy, I've already done this one." He hasn't quite grasped the fact yet that Mummy makes some of the work he does!
In my defence, there are only a finite number of sums one can make using numbers up to 10, and the pack contains 10 different worksheets!
Until next time. x