This study examined the reading gains of students with mild disabilities who were taught with one of two programs: "Horizons Fast Track A-B" (Engelmann, Engelmann, & Seitz-Davis, 1997) or "Reading Mastery Fast Cycle" (Engelmann & Bruner, 1995). A quasi-experimental design with preexisting groups was used to examine changes from pretest to posttest. Results revealed a pattern of small differences favoring "Reading Mastery Fast Cycle" on measures of decoding; however, these differences were not statistically significant. Both programs were effective in producing statistically significant improvements in word attack, comprehension, letter and word identification, phonemic awareness, and print awareness skills. Participating teachers agreed that both programs were effective; however, anecdotal information from teacher interviews suggested that all participating teachers preferred "Horizons Fast Track." (Contains 4 tables.)