The predoctoral internship in professional psychology is a culminating training experience conducted at the end of one's doctoral education. One might say that the internship is to practice what the dissertation is to research. The doctoral graduate education and training program, through didactic and experiential training in the science and practice of psychology, affords the student an opportunity to learn the basic competencies necessary to provide psychological services. The internship building on the professional competencies acquired in the student's graduate program, provides significant opportunities for the intern to assume substantial responsibility for carrying out major professional functions under appropriate supervision in a service setting. An internship in professional psychology occurs prior to the awarding of the doctoral degree and is to be completed over a one year period, at full-time training, or over two successive years, at half-time training. Accreditation and principles, accreditation guidelines, administrative setting, and the present status of school-based internships are examined. A school district could develop an internship program in professional psychology as a separate, independent, institutional entity or as one among two or more institutional entities in the form of a consortium program. (JBJ)