This editable lesson was written by Alex Benn using the concepts described in his book Tenacious-Teaching: Uniting Our Superpowers to Save Our Classrooms and his website: Tenacious-Teaching.com. It includes an introductory warm-up designed to remediate the required prerequisite knowledge; concise notes; tasks that require escalating effort; numerous examples to prevent misconceptions; and in-class practice problems to promote mastery. It does not include answers to the tasks provided. Those are