Yesterday I gave my students this problem to work on. Baseball Jerseys. I tried to not be helpful and they were not liking it (at first). I monitored groups and asked questions as I walked around to point them in the right direction. I loosely followed the 5 practices for mathematical discussion for this activity and the discussions were fantastic!
Here are the images I used (in order) to lead the class discussion.
|After most group picked a few random numbers to try, they decided to organize their work in a table (some took some convincing).|
|I included this one next because this group has a table (I wish they had gone beyond 15) AND the advice below.|