The purpose of this study was to conduct a systematic review of the secondary transition correlational literature to identify in-school predictors of improved postschool outcomes in the areas of education, employment, and/or independent living for students with disabilities. Based on results of this review, 16 evidence-based, in-school predictors of postschool outcomes were identified. Of the 16 predictors, 4 (25%) predicted improved outcomes in all three postschool outcome areas, 7 (43.8%) predicted improved outcomes for only postschool education and employment, and 5 (31.3%) predicted improved outcomes for employment only. Limitations and implications for future research and practice are discussed. (Contains 2 tables and 1 figure.)