This third edition of the classic resource, Building Expertise draws on the most recent evidence on how to build innovative forms of expertise and translates that evidence into guidelines for instructional designers, course developers and facilitators, technical communicators, and other human performance professionals. Ruth Colvin Clark summarizes psychological theories concerning ways instructional methods support human learning processes. Filled with updated research and new illustrative examples, this new edition offers trainers evidence-based guidelines to help them accelerate genuine expertise within their organizations.