Maths lesson today: Year 7 mid ability lesson on fractions. They're basically going through the idea of reciprocals, that 1/x * x = 1 regardless of what number you use for x. After going through basic numbers, the teacher starts putting more exotic things in for x for a mix of fun and to test understanding. So he asks them what goes in the gap to complete 1/😊 * _ = 1, and what goes in the gap to complete 1/log25 * _ = 1.
Then he asks 1/4! * _ = 1, and the kid who gets picked just shouts "FOUR!" as the answer. Which yeah, we'll accept that.
Later in the lesson some comment was made about the number 9, and the teacher says something along the lines of "Yes, nine is generally equal to nine. ...Unless it's NINE of course. That's quite different." The kids laughed even though they probably didn't mostly get the joke. I sat there laughing and trying to maintain my composure.
All in all it was a fairly successful lesson. I mean reasonably at least.