This Problem Set is a part of the Lesson 11, Unit 1, Grade 3. In this lesson, students learn to use tape diagrams to distinguish division situations where the quotient represents the size of each group (for example, "Ms. Alves puts 21 papers in 7 piles. How many papers are in each pile? "), and situations where the quotient represents the number of groups (for example, "There are 8 crackers, but this time each student gets 2.