Discover how the structure of DNA relates to its hereditary function in these videos from the American Masters film Decoding Watson. The first video, "DNA Structure and Function," can be used with all middle and high school biology classes. The second video, "Discovering DNA," is the Hereditary Material, contains advanced material and is more suited for students in AP Biology classes. The accompanying classroom activity, appropriate for all students, explores how the building blocks of DNA assemble into a double helix. Additional support materials are available, including discussion questions and vocabulary.