Descriptions are provided of the pioneers of identification. Traditionally, training has consisted of either apprenticeships or various forms of self-teaching. Different techniques of training are examined to illustrate why some fail while others succeed. Examples of self-study demonstrate that such a training technique is undesirable due to the tendency of individuals to alter procedures for specific needs. Such alterations interfere with the establishment of national uniform procedures. The application of fingerprinting to law enforcement was gradual due to the need for highly reliable results. To obtain accurate results, classes and tutelage was required to assure that all students were receiving the same technical knowledge. As procedures became more standard, self-teaching became more effective. Examples of instructional books and schools that teach proper fingerprinting are provided to explain the more recent developments in training. The development of certification requirements are also examined. 50 references and photographs.