Over the last two decades, the emphasis on communication in the mathematics classroom has expanded. We now know that more extensive communication, including discussing and writing about problems and ideas, can have a positive effect on concept development and retention, as well as problem-solving ability. Today, students often work in groups, communicating with their peers and teacher as they organize and make sense of information. They critique their own work and their classmates' statements to develop new mathematical understanding. As a teacher, it is helpful to consider the aspects of communication that are of particular importance to students.

  Defining the Communication Standard