This Instructional Activity is a part of the Lesson 6, Unit 8, Grade 7. In this activity, students estimate the probability of a real-world event by simulating the experience with a chance experiment. Students see that that multiple simulation methods can result in similar estimates for the probability of the actual event. Arrange students in groups of 3. Prepare each group with supplies for 1 type of simulation: choosing a slip from a bag, spinning a spinner, or rolling 2 number cubes.