The American Chemical Society's National Historic Chemical Landmarks (NHCL) program has a mission "to enhance public appreciation for the contributions of the chemical sciences to modern life in the United States and to encourage a sense of pride in their practitioners for chemistry's rich history." Individuals are invited to nominate landmark sites as a collaborative way to increase awareness about the history of chemistry in the United States. The NHCL program also offers a collection of six Landmark Lesson Plans. Designed for high school classrooms, these lessons address topics including the development of baking powder; the discovery of fullerenes in 1985; and Norbert Rillieux's pioneering work on thermodynamics in the nineteenth century. All lesson plans and accompanying materials can be easily downloaded as PDFs. Visitors may also explore Chemical Landmarks via interactive map or timeline.