Common Core Content Standards and Practice Standards require many, but not all, teachers to change the way they are teaching. Math classrooms, in general, should not look like the math classrooms of fifty years ago (or even 20 years ago). Number Talks can facilitate these changes and can make teachers and students excited about the changes. A Number Talk is a purposeful whole class activity the goals of which are to build mental math and computational strategies, to develop the Mathematical Practices (for teachers and students) and to deepen understanding of mathematics. In other words, to develop number sense. This session will explain the who, what, where why and how of Number Talks. We’ll look at the differences in primary, elementary, middle, and high school Number Talks. And we’ll try to do a Number Talk ‘on the air’!!!