This teaching manual outlines a lesson plan for a 9th grade science class about the liver. The objectives are to develop students' factual, conceptual, and procedural knowledge of the liver and its functions through group discussions, explanations, questioning, and a hands-on model activity. Students will learn new terms related to the liver, its components, and its role in secretion and other bodily functions. The goal is to improve students' observation, communication and prediction skills, and foster a scientific attitude about the importance of the liver.