In response to the ban on affirmative action and the decrease in racial minority enrollment, the Texas legislature created the Texas Top 10% rule, which mandates public higher education institutions to admit undergraduate applicants who graduate in the top 10% of their high school class (Cortes & Friedson, 2014; Daugherty et al., 2014; Watkins & Satija, 2016). A growing number of Texas high school students are participating in dual credit classes allowing students to earn simultaneous high school and college credits. Some dual credit programs require students to pay for these college-level courses. In addition, some high schools also award weighted grade points for dual credit courses since they are considered advanced-level courses. The purpose of this quantitative study was to determine how enrollment in dual credit courses in Texas impacted the competitiveness of students' ranking in the top 10% of their high school graduating class and how equitable access to dual credit impacted low-income students' ability to graduate in the top 10% of their classes. This study also examined the problem of limited access to dual credit courses for low-income students and the potential for inequity in the access to weighted grades. The study used the framework of opportunity hoarding to consider the role financial resources play in dual credit programs and graduation ranking policies. The researcher found that students in the top 10% attempted significantly more dual credit hours when compared to students who did not graduate in the top 10%. The study also found that there was not a significant difference in the number of dual credit hours attempted for low-income and non-low-income students and that there was a significant relationship between racial minority classification and income status. Finally, the researcher found that there was not a significant difference in the dual credit GPA for low-income and non-low-income students. Due to limits in the availability of data for high schools, the researcher was not able to determine the impact dual credit enrollment has on attendance at flagship institutions. [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.]