It wasn't my idea, but I quickly agreed to play along...
With the break for the holidays, I've been setting up quite a few play dates for my kids. This week my son had someone new over, spurred by a mutual interest in Legos. The morning the boys were to get together, the mom asked me if I'd play along with a little joke she was pulling on her son.
She told him they were participating in a half-day math seminar that afternoon. She made him pack up his math book and they were on their way to our house, practicing flash cards on the way. When he arrived, I had the following waiting for him by our kitchen table.
He just sort of paused at the board when he saw it. I can only imagine what was going through his head. The plan was to eat lunch first, then go on to the "seminar". After lunch, our guest whispered to his mom if it would be ok to play for a little while. Her response was, "Now A, do you know why we are here?" He sort of hung his head and said, "I know..."
When she announced he was over to play...and only play...his face looked like it was Christmas morning! He was such a good sport, and very happy to not do math that afternoon.
Then I had a thought. I had no clue the meaning of the formulas I used for the board. Having graduated with an engineering degree, I'm sure I did at one time. I'll need a refresher before my oldest hits calculus in high school. Maybe I'm the one that should be spending the afternoon doing math. I guess the joke was on me!