A two-day lesson on taxicab geometry introduces high school students to a unit on proof.
Derek A. Williams, Kelly Fulton, Travis Silver, and Alec Nehring
Deanna Pecaski McLennan
Susan Ahrendt, Debra Monson, and Kathleen Cramer
Examine fourth graders’ thinking about the unit, partitioning, order, and equivalence on the number line and consider ways to orchestrate mathematical discussions through the Five Practices.
Nicholas J. Gilbertson
When students encounter unusual situations or exceptions to rules, they can become frustrated and can question their understanding of particular topics. In this article, I share some practical tips.