Mathematics can be incorporated into the study of how long ago something occurred and how much the money is worth. Language arts can be used to create a story about the origin of the Confederacy or the route the money may have traveled over time. These ideas can all lead to further research, leading to further questions. Primary sources can be found everywhere. If that appears an oversimplification, one needs only to think about the expanded definition of primary sources.
Travel is another way to acquire artifacts for classroom use.
Local historical societies and places of historical significance are often willing to loan materials to teachers and may even provide an interpreter to explain and demonstrate how the artifact was used. State historical bureaus, museums, and libraries have replicas of primary sources in their collections. Diaries, letters, photographs, drawings, and other such items are often used to teach state and local history. State and national parks often have similar materials available. Ethnic, social, and cultural clubs may provide artifacts for classroom use or make speakers available to schools.