Abstract The Martin C. (Marti) Wiltgen collection consists of an audiocassette, a CD duplicate of the audiocassette, and a transcript an oral history interview conducted between Wiltgen and Julie M. Arndtsen during the fall of 1989. Wiltgen worked as a humanities teacher at Mankato West High School. In the interview, he discussed the changes and continuities that occurred during his teaching career. He believed that changing social mores caused the most significant changes in the teaching...