This study is a follow-up to a previous study (Tobin, 2003) that compared the effects of two reading programs, Horizons Fast Track A-B and Silver, Burdett, & Ginn, on reading achievement of first grade students. Results indicated that the first grade students in the Horizons group significantly outperformed the students in the Silver, Burdett, & Ginn group. In this follow-up study, scores of these students on the third grade reading and fourth grade language arts Massachusetts Comprehensive Assessment System (MCAS) were compared. Statistically significant differences between the Horizons group and the Silver, Burdett, & Ginn group were observed on both the third grade MCAS and the fourth grade MCAS. These results indicate that the Horizons group still outperformed the Silver, Burdett, & Ginn group two and three years later. (Copyright © 2011, National Institute for Direct Instruction (NIFDI). All rights reserved).