A disconnect exists between principal leadership expectations and the actual practice of supervision and evaluation of principals. Increased principal responsibilities and rigorous standards require that a new approach to principal evaluation be considered. The authors provide a framework for a multi-dimensional approach to principal supervision and evaluation. This conceptual leadership evaluation model provides a multi-step evaluation process that embeds (a) a supervisory relationship based on trust, (b) selection of research-based leadership standards, (c) collection of performance data using multi-dimensional approaches, and (d) a rubric for judgments and decisions based on principal performance supported by the data. This article presents a framework or system of principal evaluation built upon previous research and experience. (Contains 1 figure.)