The purpose of this research was to identify and outline the work-related skills that cooperating teachers in the Cayman Islands and Saint Kitts-Nevis developed or reinforced as they supervised student-teachers. A qualitative case-study methodology was used. The findings indicate that cooperating teachers developed and reinforced essential teaching, mentoring, collaboration and strategic skills, but failed to identify others that were considered key to their professional growth. The paper addresses these and concludes with the implications of the study for teachers' professional development. (Contains 1 table.)