A theory of vocational education would be a set of reasoned beliefs about the goals, policies, organization, curriculum, and methods of teaching and learning for a program designed to produce occupational competence. The well-worked-out theory would provide a consistent set of guiding principles that might result in a consistent policy for action. Need for a theory of vocational education depends on how much its policy requires the clarification of basic arguments for vocational education. Vocational education must be justified, and this can be accomplished by having vocational educators who explore the possibilities of rationalizing, standardizing, depersonalizing, and intellectualizing vocational occupations. A model for a theory of vocational education is virtually synonymous with a curriculum for the preparation of teachers and other professional workers in the field. The model includes two major sections: the foundational studies presumably to be required of all and the specialty. (YLB)