The purpose of this study is to investigate the effect of use of graphing calculators on student achievement in Common Core Algebra I. The following are the research questions of the proposed study. To what extent does use of graphing calculators in the math classroom affect student achievement? How might the use of graphing calculators in the math classroom affect basic computation skills of students? How might the use of graphing calculators affect the percentage of students receiving passing scores (70% or higher)? A quasi-experimental quantitative research design is employed for this study. The sample includes a treatment group (N = 36) and a control group (N = 32). Students in the treatment group were given a TI 84 Plus graphing calculator to use during in-class lessons and assessments. Students in both groups were given a test in both content and basic computation prior to the study to establish a baseline achievement score. Both groups participated in taking four free-response common assessments at the end of each chapter during the data collection period. The participants were also given the basic computation assessment at the end of the study. Repeated Measures of Analysis of Variance were performed to analyze the data. Use of graphing calculators in Common Core Algebra I did not show statistically significant effect on student algebra performance, computation skills, or percentage of students receiving passing scores (70% or higher) in Algebra I. However, descriptively, participants in the treatment group did have higher mean scores than the control group on some assessments when accounting for prior knowledge. Furthermore, participants in the treatment group did have higher growth mean scores from the basic computation baseline to the basic computation posttest. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]