Prekindergarten Head Start teachers were trained to administer the Learning Accomplishment Profile (LAP), an objective check list of development in seven areas: gross motor, fine motor manipulation and writing, social, self help, cognitive, and language skills. Data were collected from separate groups of 3, 4, and 5-year old children to ascertain how well the instrument differentiated between age groups and how consistently items were administered from site to site. A questionnaire administered to these teachers showed generally positive attitudes toward the LAP, and showed that the instrument provided useful information, although further revision was recommended. (CTM)