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Focus of Lesson: Calculate using the combination formula. A few permutation questions are included for purposes of review. Another product, "Counting Principle, Permutation, Combination Word Problems (Close Reading)" focuses on applying formulas to word problems.
Lesson: Use the PowerPoint presentation with layered animation accompanied by a whole class discussion.
Alternate Lesson: Does your school have one-to-one computing? Have students view the presentation on their own device. This option allows students to proceed at their own pace and ask the teacher for clarification as needed.