Although the nation's two-year college movement has been largely successful in providing higher education to a broad range of people, new barriers are emerging to the performance of this function. The problem is evident in the fact that increasing numbers of students neither enter nor leave the educational system with the competencies necessary…

The research reported in this paper identifies the "core curriculum" and "optional curriculum" suggested by widely used textbooks of elementary school mathematics and describes the influence of each on teacher autonomy in selecting the content of instruction. Preliminary analyses suggest that the "core curriculum" is generally consistent with…