Math Centers are a perfect activity for the classroom! They allow for collaboration among students and "math talk", which is a key piece of the common core. Also, you have time to reteach and enrich students. These math centers are designed to go along with topic 12 in the Envision Math® 2.0 curriculum.
Topic 12 focuses on identifying and describing basic characteristics of 2D and 3D shapes. Since the centers are aligned with the common core math standards, they can still be used with a different core curriculum.