This Instructional Activity is a part of the Lesson 1, Unit 5, Grade 7. Students read the paragraph silently. Have you ever heard a weather forecaster say there is a chance of rain tomorrow or a football referee tell a team there is a chance of getting a heads on a coin toss to determine which team starts the game? These are probability statements. In this lesson,you are going to investigate probability and how likely it is that some events will occur. Place students into groups of two or three.