Elementary and secondary school teachers were asked to rate the sources that influence their decisions on what they teach in their subject areas. Possible influential sources were identified as: (1) district consultants; (2) state or district recommended textbooks; (3) state curriculum guides; (4) commercially prepared materials; (5) teachers' own background, interests, and experiences; (6) other teachers; (7) students' interests and abilities; (8) parent advisory council; (9) state equivalency exams; (10) district curriculum guides; and (11) teachers' unions. Teachers' subject areas were: (1) the arts; (2) English, reading, and language arts; (3) mathematics; (4) physical education; (5) science; (6) social studies; (7) foreign languages; and (8) vocational/career education. Two sources were reported as having high influence across all subject areas: teachers' own background, interests, and experiences and student interests and abilities. Four sources were rated low in influences across all levels (elementary, junior high/middle, and high school): district consultants; parent advisory councils; state equivalency exams; and teacher unions. Summaries are presented of influential sources on each of the subject areas at each teaching level along with analyses of apparent trends in teachers' responses to the sources. Tables are appended displaying percentages of teachers reporting the degrees of influence by subject area and levels of schooling. (JD)