The effectiveness of the first 5 years of tech prep in New York was examined through a three-component evaluation. Data were obtained from three sources. First, statewide surveys and interviews obtained input from 717 teachers, counselors, and administrators and 987 students currently involved in tech prep programs in New York's 30 tech prep consortia and an additional 132 tech prep professionals and 79 students and 15 local decision makers from outside the educational system. Second, a pairs study compared the performance of 1,050 tech prep students representing 15 consortia and 804 non-tech prep students. Third, a study of best practices in tech prep programs in 28 consortia was conducted. Most program participants found tech prep beneficial to students' academic, career, and social development and to staff, schools, and the community. Compared to their non-tech prep counterparts, tech prep students earn higher grades, have better school attendance, and have higher high school graduation rates and scores on New York's Regents Competency Tests. (Sixty tables are included. Appendixes constituting approximately two-thirds of this document contain information about the following: survey and interview methodologies and respondents; pairs study coding forms and instructions; study regression models; and descriptions of 97 best practices.) (MN)