Examination of the relationship of musicianship and educatorship of teacher and students as interacting partners in a specific musical context proceeded with investigation of how formal, informal, impressionistic, and supervisory musical and educational knowledge were evidenced in rehearsal. Attention was also given to how the teaching strategies of modeling, coaching, scaffolding, fading, articulating, reflecting comparatively, and exploring were used to develop student musicianship. The research methodology may best be described as an inductive analytical case study approach. Multiple data sources included: videotaped observations of 19 bi-weekly rehearsals, audio taped interviews of the 12 participants, supplemental materials, (a published interview, journal articles, rehearsal schedules), and member checking with the teacher and David Elliott. Rehearsal data were initially organized into categories identified in David J. Elliott's (1995) model. The relationship of teacher and student musicianship, and teacher educatorship emerged during analysis. Musical details of problem finding, reducing and solving were also identified. Three themes emerged from the student interviews: their perceptions of the teacher's musicianship, general rehearsal strategies, and the teacher's use of specific teaching strategies. Interviews with the teacher illuminated his perception of musicianship and teaching strategies employed in the context. The findings confirmed that as music making transpired in the rehearsals, the kinds of knowing present in the musicianship of teacher and students and the teacher's educatorship were not only intertwined but were utilized at the same time. The level of student musicianship was allied to the relationship of the teacher's musicianship and educatorship. The intricate relationship between the kinds of procedural knowledge that Elliott identifies as integral to music making and music teaching are illustrated in a set of diagrams. Additionally, they show the wide range of technical and musical problems the teacher and students solved together in order for the multifarious nature of the vocal jazz repertoire to be performed effectively in a series of concerts.