37... that is the number of jumping jacks I did today.
3... that is the number of push-ups Ethan did today.
I made a deal with Ethan. With the timer set for 3 minutes, for every math flash card he answered correctly, I would do a jumping jack at the end. For every flash card he answered incorrectly, he would do a push-up.
Bravo Ethan! It was worth every jumping jack. :)