Humanitas: The American Republic is designed as a one-semester, high school American History course.

Humanitas: The American Republic Teacher Guide PDF offers teachers further resources for understanding the texts included in Humanitas: The American Republic. The guide supplies teachers with lesson objectives and plans. "Teacher's Tips" point to specific portions of the source document, provide additional context for the source documents, and suggest points of discussion. "Look Ahead" and "Look Back" notes will help teachers show students how the various source documents relate to each other. The questions for discussion and writing that appear in the student edition are also included in the teacher's guide for easy reference.

Unlike most contemporary approaches to history, which reflect the fashions and biases of the fleeting present, Humanitas offers students something more substantial. Following C.S. Lewis’s stout defense of reading primary sources in “On the Reading of Old Books,” Humanitas will help “persuade the young that firsthand knowledge is not only more worth acquiring than secondhand knowledge, but it is usually much easier and more delightful to acquire." Geared towards history, humanities, and humane letters courses, the Humanitas series offers a continuous, unfolding narrative of Western Civilization through a series of carefully curated primary source documents.