This Note presents a conceptual framework for appraising the value of staff development activities. The main components of the framework are (1) a definition of staff development, (2) a mapping sentence describing four of the salient organizational features of staff development, (3) a description of the roles of key participants in staff development, and (4) an evaluation perspective for staff development. The evaluation perspective (component 4) consists of three dimensions: worth, success, and merit. Section II provides a full discussion of each dimension, its conditions, and their interrelationships. Section III illustrates the use of the conceptual framework for appraising the value of proposed staff development activities. Several typical staff development activities are analyzed to show the use of the framework for evaluating activities that are under consideration, but have not yet occurred. The concluding section briefly discusses research and policy issues arising from the application of the framework to staff development activities.