Absolutely nothing of note happened today other than my giving a five-year-old a three minute lesson on fractions and decimals. His Lego Mindstorms robot needed a 0.6 second left turn correction; how to teach him how to do it without doing it myself?
I put in the command for him and asked him to get the time. He didn't understand the concept of "less than one but more than zero."
I taught this kid fractions and decimals- sort of- in three minutes flat.
And he understood.
That was, in retrospect, quite satisfying.