Peer coaching is a process that enhances teaching repertoires of physi
cians and engages them in an agreement to help one another become bett
er teachers. Peer coaching develops a shared language and set of commo
n understandings essential for collegial study. It is a cyclical proce
ss in that clinicians' understanding and use of new skills is enhanced
by demonstration, practice, and feedback. The analysis presented in t
his case study discloses the way the conversational interactions of a
family physician diminished or improved instructional value of the tea
ching encounter. Teaching encounters and interactions with peer coache
s were videotaped and analyzed using discourse analysis and politeness
theory to understand aspects of the teaching encounters. Findings sug
gest the physician-teacher's politeness strategies improved considerab
ly with training. Further research may help in applying pedagogical co
ntent knowledge to clinical teaching in medical education. it may prov
ide substantive answers about shared language of physician- teachers,
students, and peer coaches.