FM 21-6 Techniques of Military Training 1954-05-19 "This manual is designed to assist Army instructors in teaching efficiently. All officers and noncommissioned officers must know how to teach. As specialists, they may have an excellent knowledge of some phase of the military profession; but in order to teach others, they also must know the best methods and procedures for imparting their knowledge. This manual presents specific methods and techniques of military instruction which will tend to insure successful teaching."