Does it fit? How do you know? What can you say about the other balls after you try one of them? What statement can you make after you try the solid blue ball and it barely fit? Students used conversation and reasoning to figure out that if the solid blue ball barely fit then the balls larger would not fit and the balls smaller would. We tested this theory and they were excited about their thinking, revising and discussing skill that were necessary to figure out this problem! Math can be challenging but working together to problem solve makes everyone feel valued and safe in our community to take risks in their learning.
