The extensive body of research into the relationship between online dual credit coursework and the academic success in subsequent coursework for South Dakota students is not well known. South Dakota students are flocking toward the online dual credit option for a number of reasons--reduction in tuition, expedient degree attainment, and to challenge themselves with more rigorous coursework to name a few. This study used quantitative, ex post facto data to identify any relationships that may exist between grades earned in online dual credit and those earned in the subsequent college coursework, a relationship between the grades earned in online dual credit coursework and scores earned on the ACT exam, and look for a relationship between online dual credit achievement and gender. The results of this study showed a positive correlation between grades earned in online dual credit and those earned in subsequent college coursework as well as the grade earned in online dual credit and ACT achievement score. [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.]