The research study examined whether a difference existed between the reading achievement scores of an experimental group and a control group in standardized reading achievement. This difference measured the effect of systematic oral reading fluency instruction with repeated readings. Data from the 4Sight Pennsylvania Benchmark Reading Assessments and the DIBELS Oral Reading Fluency Benchmark measured reading achievement outcomes of fourth and fifth grade students at two Pennsylvania elementary schools using a pre-test and a post-test measure. Paired and independent t-test analyses examined differences in outcomes within and between each group at the p=.05 level of significance. Statistically significant differences on both measures were found within the experimental and control groups. Twenty one appendices are include: (1) Sample Cover Page of the 4Sight Pennsylvania Benchmark Reading Assessments; (2) Sample Cover Page of the DIBELS Oral Reading Fluency Benchmark Assessment; (3) Sample Cover Page of the DIBELS Oral Reading Fluency Benchmark Assessment; (4) 4Sight Pennsylvania Benchmark Reading Assessments--Grade 4 Control Group Pre-Test and Post-Test Score Outcomes; (5) 4Sight Pennsylvania Benchmark Reading Assessments-Grade 4 Paired T-Test Analysis of Control Group; (6) 4Sight Pennsylvania Benchmark Reading Assessments-Grade 4 Independent T-Test Analysis of Pre-Test Outcomes; (7) 4Sight Pennsylvania Benchmark Reading Assessments-Grade 5 Control Group Pre-Test and Post-Test Score Outcomes; (8) 4Sight Pennsylvania Benchmark Reading Assessments-Grade 5 Experimental Group Pre-Test and Post-Test Score Outcomes; (9) 4Sight Pennsylvania Benchmark Reading Assessments- Grade 5 Experimental Group Pre-Test and Post-Test Score Outcomes; (10) 4Sight Pennsylvania Benchmark Reading Assessments--Grade 5 Paired T-Test Analysis of Control Group; (11) 4Sight Pennsylvania Benchmark Reading Assessments-Grade 5 Independent T-Test Analysis of Pre-Test Outcomes; (12) DIBELS Oral Reading Fluency Benchmark Assessments-Grade 4 Control Group Pre-Test and Post-Test Score Outcomes; (13) DIBELS Oral Reading Fluency Benchmark Assessments-Grade 4 Experimental Group Pre-Test and Post-Test Score Outcomes; (14) DIBELS Oral Reading Fluency Benchmark Assessments-Grade 4 Paired T-Test Analysis of Control Group; (15) DIBELS Oral Reading Fluency Benchmark Assessments-Grade 4 Independent T-Test Analysis of Pre-Test Outcomes; (16) DIBELS Oral Reading Fluency Benchmark Assessments-Grade 5 Control Group Pre-Test and Post-Test Score Outcomes; (17) DIBELS Oral Reading Fluency Benchmark Assessments-Grade 5 Experimental Group Pre-Test and Post-Test Score Outcomes; (18) DIBELS Oral Reading Fluency Benchmark Assessments-Grade 5 Paired T-Test Analysis of Control Group; (19) DIBELS Oral Reading Fluency Benchmark Assessments-Grade 5 Independent T-Test Analysis of Pre-Test Outcomes; (20) Repeated Reading Chart; and (21) Participating Teacher in Experimental Group Information. (Contains 6 tables and 2 figures)