This past summer, I decided to add more playfulness to my classroom routine (read more about Quarter Trios here) and one of the mainstays of the new “game plan” is the use of weekly Brain Teasers. Originally, I had planned to use just one puzzler each week, either as part of a bell-ringer routine or as an emergency “ack, third period just finished this task 10 minutes faster than all of my other classes” time-filler.

Deep into the fall semester, the reality has been Continue reading