Higher Horizons (HH) 100 is a program providing groups of 100 underachieving secondary school students in Hartford, Connecticut, with an integrated program of academic, cultural, and counseling services designed to develop and improve their basic skills in language and mathematics, self-concept, and adjustment to school. The eight small cluster settings allow intensive counseling, individualized instruction, and integrated cultural and educational activities, as well as a series of student run and staff directed projects. In the project's sixteenth year, HH 100 operates a ninth grade team at each of Hartford's high schools, a tenth grade team at one high school, and two teams at each of the middle schools, with Funding from Title I. Each team is staffed by five or six teachers, a counselor, and a project aid. When recent fall-to-spring Metropolitan Achievement Test data were analyzed by team and by grade level, all gains were highly significant, exceeding the projected standard. The upgraded percentile gain standard was reached by all but one team in reading, one grade level with a team in mathematics, and both grade levels within one team in language arts. At least 90% attendance was attained by all teams. Students reported a realistic and positive attitude toward themselves and school, on a self-rating measure similar to those used in previous years. (Author/HTH)