The purpose of teacher development in the Church is to -
Help members teach the gospel effectively.2. Continually train and support priesthood and auxiliary teachers.
To be a teacher is a great and sacred responsibility. To be an effective teacher, a member must live worthy of the influence and direction of the Spirit and must make prayerful preparation. The Lord has counseled, "If ye receive not the Spirit ye shall not teach." (D&C 42:14.) It is this Spirit that teaches us "all things" (Moro. 10:5). No learner or teacher should attempt to receive or convey understanding of the gospel without the Spirit.
Instructions for Priesthood and Auxiliary Leaders on Teacher Development
