This Instructional Activity is a part of the Lesson 6, Unit 6, Grade 6. Read the introductory paragraph to the class. Choose a student to read Robert's thought process out loud. Recall that in Lesson 3, Robert, a sixth grader at Roosevelt Middle School, investigated the number of hours of sleep sixth-grade students get on school nights. Today, he is to make a short report to the class on his investigation. Here is his report.