Learning goals: Teacher Facing Describe (orally and in writing) reasons why the relative frequency from an experiment may not exactly match the actual probability of the event. Recognize that sometimes the outcomes in a sample space are not equally likely. Use the results from a repeated experiment to estimate the probability of an event, and justify (orally and in writing) the estimate. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.8 Probability and Sampling, Grade 7.