With the continuing increase of inclusive education in our public school classrooms today, there is a great deal of interest in co-teaching teams. Research indicates that administrative support is a critical factor in co-teaching effectiveness. In this study, we explored administrator knowledge and practices related to the supervision and evaluation of co-teachers in inclusive classroom settings. Clear themes that emerged were related to professional preparation and training; expectations and perspectives of co-teaching and inclusive practice; and supporting, supervising, and evaluating co-teachers. The data indicated that there is considerable inconsistency in administrator knowledge and practices and that professional development for administrators is warranted. Implications for practice as well as questions and issues for further research are discussed. (Contains 1 table.)