Teaching is an art based upon the carefully considered scientific principles of pedagogy; therefore, teacher training has been an established policy of the Sunday School in The Church of Jesus Christ of Latter-day Saints. A fundamental educational responsibility in the Church is the preparation of members to teach well by providing them with methods for successful instruction. To accomplish this objective, the Sunday School developed a teacher training program whereby members became more proficient teachers.The purpose of this study was to reconstruct the historical development and present a concise history of the teacher training program administered by the Sunday School of The Church of Jesus Christ of Latter-day Saints. This history will be valuable to administrators of the teacher development program of the Church, to developers of future Church teacher development courses, and to students of Mormon history who have no complete history of their own and must depend upon single sources and independent studies.