This SMART Notebook lesson has been adapted from Eureka Math 3rd grade Module 2 Lesson 17. I have included the majority of the lesson except the part where the module teaches them to round to the 50s. I chose to leave that part out because that is a 4th grade standard and I do not want to confuse my third graders. Included is an essential question, the group counting, teacher instruction slides, problem set, and exit ticket. Even if you are not using Eureka Math in your classroom, this lesson still can be used because it correlates to the Common Core for 3rd grade.