This study was designed to document the key factors in the success of 12 urban high schools that prepare students for specific occupational fields as well as for college entrance. Case studies were used to gather information from the schools in the New York City, Chicago, and Metropolitan Los Angeles school districts. The research yielded 10 factors that may be associated with the success of the schools: (1) a safe and orderly environment conducive to teaching; (2) a businesslike attitude of teachers and students; (3) a warm and caring school climate; (4) an admissions process that makes students feel special--based on student interest in the career specialty, not solely on test scores; (5) a dual mission to prepare students for an occupation and for college; (6) high expectations for all students to succeed accompanied by attempts to minimize grouping students by ability; (7) a curriculum organized around an industry or a discrete set of subjects; (8) the integration of theory and practice in the courses of instruction; (9) strong linkages with business and industry and sometimes with local institutions of higher education; and (10) leadership in the office of the principal that is inspiring, sensitive, and firm. These schools sometimes encounter barriers in the form of school district and teacher union regulations about teacher hiring and training of teachers as well as from budget constraints. However, they are not much more costly than regular schools and are much more effective in their urban neighborhoods than other schools. (Report includes the case studies, 16 references, the interview guide and case study outline, and delivery system specifications used for the cost comparisons.) (KC)