This new, three-book series focuses on the critical role that number sense plays in developing mathematical understanding. Number sense encompasses a wide range of skills, including being able to make reasonable estimates and to think and reason flexibly. These lessons help students develop good number intuition and the ability to see numbers as tools, not barriers.

By encouraging young children to reason their way to solutions, teachers help students form a solid foundation upon which all of their later mathematical understanding will be built. Teaching Number Sense lessons are organized in an accessible, easy-to-read format that includes:

  • Overview Materials list
  • Step-by-step teaching directions
  • Vignette of how the lesson actually unfolded in a classroom
Each lesson concludes with a list of assessment questions to help guide teacher observations.