This is a cancer unit, intended for high school biology classes, focused on cell growth, cell cycle, and mutations. Over ten lessons, students investigate the case of Hina Marsey, an eleven-year old girl, who is diagnosed with a rare form of leukemia. As the unit unfolds, students develop conceptual models on cell growth, cancer, and treatments for leukemia. The unit builds toward a wet lab in which students conduct a gel electrophoresis lab to understand what it means to look for a "match" for transplantation.