President Thomas Jefferson orchestrated the Louisiana Purchase and then appointed Lewis and Clark to organize and execute an exploration of the American West. This presentation discusses the Louisiana Purchase, the goals of the expedition, and the preparation for the journey. It also examines the people of the expedition including Sacagawea and her incredible contributions to the success of the mission and York, an enslaved African American who played an important role in the expedition. You and your students will see where the expedition began in St. Louis and view the Jefferson National Expansion Memorial and the famous Gateway Arch which commemorates the age of Western Expansion. Also, you’ll discover that the explorers made copious notes and gathered samples on their treacherous journey, they learned and were helped by Native Americans, and they brought back that information upon their return. Finally, you and your students will see a collection of views of the terrain and animals from the route taken by Lewis and Clark. This 31 slide presentation has rich, informative text and original photographs taken by the author. It is easily adaptable to a variety of age levels.