This study compared the reading gains of Kindergarten students who were at risk for reading failure who were taught with either a structured supplemental reading program or with teacher-designed or teacher-selected instruction. The authors used a quasi-experimental design with preexisting groups to examine changes from pretest to posttest. Although both programs were effective in producing statistically significant improvements in word attack and phonemic awareness skills, results revealed a pattern of moderate differences favoring a structured supplemental program called the Early Reading Tutor. Furthermore, anecdotal information from questionnaires suggested that participating tutors who used Early Reading Tutor would recommend it to others and considered it an effective yet simple program to implement.