This Problem Set is a part of the Lesson 2, Unit 2, Grade 3. In this lesson, which focuses understanding time as a continuous unit of measurement, students relate skip-counting by fives and telling time to the number line. They label hours as endpoints and divide the length of the segment into multiples of 5. Through this work, students can recognize the analog clock as a portion of the number line shaped into a circle and use the number line as a tool for modeling and solving problems.