This paper describes magnet school programs offering a special or enhanced curricula to attract an ethnically diverse population at all grade levels in the Houston (Texas) Independent School District (HISD). Researchers collected data through interviews, site visits, brochures, campus programs summaries, and an analysis of the Student Master File. Evaluation of the data found that 89 educational programs located on 81 campuses have been established and operated during the 1990-91 school year. Organizationally, the following four basic types of programs exist: (1) School-within-a-School; (2) Add-On Programs; (3) Separate and Unique Schools; and (4) Cluster Centers. These programs serve students in pre-kindergarten through grade 12, and feature enrichment instruction in the areas of fine arts (in 12 elementary schools and 5 middle schools); mathematics, science, and computers (in 12 elementary schools and 4 middle schools); extended instructional day; and gifted and talented (in 10 elementary schools and 6 middle schools). Two programs offer Montessori instructional methods, and 11 elementary schools offer Extended Instructional Day Programs. At the high school level there are 16 specialty programs. Data indicate that 31,653 students were enrolled in elementary and secondary Magnet programs; 67 percent were minority students (Black and Hispanic American) and 33 percent were from other ethnic groups. Study data are presented in six tables. Two appendices provide various policy statements and guidelines. (JB)