Children watch as the teacher cuts paper pizzas into two sections. One is evenly divided, while the others are obviously not equal. From this demonstration, learners discuss the concept of "half." They solve problems related to their experiences and discuss "half." One of the example problems: Jeff has 12 pieces of licorice, he gives his friend 5. Did he give his friend half? Discussions and activities are repeated with "one-fourth" and one-third."