The purpose of this study was to determine if there is a predictive relationship between the number of years a student is enrolled in an elementary school with a campus-wide character education program (CWCEP) and their academic achievement, attendance, and behavior during their high school years. This study examined whether students enrolled in an elementary school with a campus-wide character education program throughout elementary school performed significantly better in high school concerning attendance, behavior, and academic achievement. This quantitative study included 3,483 students enrolled in a large southern California school district between 2009 and 2021. The employment of Pearson's bivariate correlation, simple linear regression, multiple linear regression, logistic regression, and ANOVA analyses revealed that students who were enrolled in an elementary school with a campus-wide character education program performed better on various academic achievement and behavior indicators compared to their peers who were not enrolled in an elementary school with a campus-wide character education program during their years in elementary school. Based on the findings of this study, students who were enrolled in an elementary school with a campus-wide character education program performed significantly better on CAASPP SBAC English language arts and math assessments in Grade 8, earned more As and Bs, earned fewer Ds and Fs, recorded higher cumulative GPAs throughout high school, were more likely to complete the A-G requirements for the University of California and California State University systems, and recorded fewer education code (a) violations during their 4 years in high school. The findings of this study might contribute to the knowledge base used by districts, school site administrators, and educational partners interested in selecting campus-wide character education programs for elementary schools with the long-term goal of improving student achievement and behavior during their years in high school. [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://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]