This is a complete lesson plan in the preferred "5-E" format. The lesson as presented takes approximately 80 minutes to complete in an introductory-level high school biology class, but can easily be modified or spread over two 45 minute periods. This lesson includes a graphic organizer that allows students to cooperatively share information about pH, a laboratory investigation of pH using simple household chemicals, and an exit ticket. I recommend using the lye-burn scene from Fight Club as an eye-popping engagement piece. This received rave reviews from my students and administration.
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