The International Baccalaureate (IB) Diploma Programme is an international college-preparatory program that offers two levels of participation: IB diploma candidate and IB course candidate. The purpose of this study was to determine if there is a difference in college-related outcome achievement between these groups so that students and stakeholders can make informed decisions about their level of participation in the IB program. Quantitative data was collected and analyzed using statistical tests to compare the college acceptance, enrollment, retention, and graduation rates, as well as the time to college graduation, of IB diploma candidates and IB course candidates. There was a statistically significant difference between the groups on college acceptance rate, with IB course candidates having a higher acceptance rate. There was not a statistically significant difference between the groups on the other four outcomes. However, the outcomes of the IB students in the sample as a whole were high, indicating that the IB program leads to college success. It is recommended that students be encouraged to participate in the IB program, that students be allowed to choose their level of participation in the IB program, and that steps be taken to give students the skills necessary to enroll in IB classes. The results of this study inform all stakeholders, but they especially empower students to choose how they participate in the IB program not out of a perceived benefit when it comes to college, but based on what they want out of their high school experience. [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.]