The document discusses using classroom discussions and "talk moves" to support mathematics learning. It introduces the talk moves of "revoicing," where the teacher restates what a student said to help clarify their reasoning, and "asking students to restate someone else's reasoning," where a student restates what another student said. An example is provided where a teacher uses revoicing to understand a student who was unclear about even and odd numbers. The discussion continues as the teacher asks another student to restate the first student's reasoning. These talk moves help all students understand each other's contributions and participate in the mathematical discussion.