The purpose of this paper is to synthesize research on teaching expertise from physical education and other fields, although this is not an exhaustive review of the literature. After an introductory section about expertise in general and teaching expertise in particular, two examples of expertiserelated topics in physical education are discussed (the importance of personal performance skills and the importance of observational skills). The principal portion of the paper presents major findings about teaching expertise. Finally, methodological problems in undertaking research on teaching expertise are explained.