This 18-minute video shows interviews with Harvard graduates and faculty who appear confused about what causes the seasons. We also see Heather, an articulate, intelligent high-school student, who has a great many ideas about astronomy. Interviews with Heather both before and after her classroom lessons about astronomy reveal that she has learned much but is still confused about some key aspects of the subject. Although some of Heather's ideas after instruction are solid, others are inconsistent with accepted scientific ideas. Some of her ideas stubbornly resist change, both in the classroom and during on-camera challenges.