The purpose of this study was to investigate the effects of internal and external focus of attention on novices' rehearsal evaluations. Thirty-two undergraduate instrumental music education students led bands in a series of three 6-minute rehearsals on their assigned excerpt. Prior to these rehearsals, participants were led in score study and rehearsal preparation activities. Internal group (n = 16) participants' preparation related to knowledge of the score, whereas external group (n = 16) participants focused their preparations on observable rehearsal behaviors with a minimal amount of time devoted to score study. No significant differences were found between conditions for any of several dependent measures, including participants' self-evaluation of their teaching, participants' evaluation of ensemble performance, ensemble members' evaluations of conductor rehearsal effectiveness and of conductor score knowledge, and independent audio evaluation of the final ensemble performance run-through. Results of repeated-measures analyses did indicate significant improvements in participants' and ensemble members' evaluations, for both experimental groups, between the first rehearsal and the second and third rehearsals. Both methods may have helped novice conductors prepare to rehearse, but their direct experience in working with ensembles may have been comparatively more informative in preparing them for future rehearsals.