Earlier in the course, students developed their ability to reason multiplicatively and to find products of multi-digit numbers. Throughout the course, students also have been prompted to make estimates. In this lesson, they apply these understandings and skills to create their own Estimation Exploration.

The Estimation Exploration routine encourages students to anticipate multiple ways others might make an estimate, based on a given image or description, and to revise their thinking accordingly. Later in the lesson, students will facilitate their activity in small groups. The lesson may take more than one class period if students take turns facilitating their estimation problem.