Well-rounded school education is the foundation for better college education and future career success. In order to improve the standard of school education, parents, administrators, and school boards around the nation are modifying the curriculum with advanced content materials. College Board is making use of this opportunity to introduce Advanced Placement (AP) courses in different content areas in schools. The problem addressed in this study was the perceptions of college students regarding the conditions and factors that contribute to the success or failure of AP science courses in high schools and their continued influence on college science learning. The specific problem addressed by this study focused on the learning experiences of AP science students in high school and their influence on the learning of science in college. The purpose of this qualitative single case study was to describe the learning experiences of students who took AP science courses in high school. Social constructivism was used as the guiding theoretical framework to explore high school students' perceptions regarding AP science courses. The researcher conducted a demographic survey and personal interviews followed by a focus group discussion with a few purposefully selected college students who studied at least one semester of science in college after completing high school in New Jersey with at least one AP science. The results of the data analysis from the study identified 21 categories and nine themes. The study revealed that high school AP science class experiences prepared students for college science programs. There was a consensus among the research participants that high school AP science teachers contributed to the successful completion of the course. The study also revealed that different schools have varying amounts of time and resources available for AP science instruction. [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.]