Fraction models are a great way to help scholars visualize this concept, and they focus on thirds with these practice problems. First, there are five shapes each segmented into three even sections. Learners color in one-third of each, referring to an example if needed. Next, they examine four shapes with pre-colored sections to indicate if it is one-third or not (yes or no). Extend this concept by asking a group of volunteers to come up to the front. Have a small group move out of the larger group and ask the rest of the class to determine if it is one-third or not. 

Common Core

1.G.A.3 2.G.A.3