This research investigated high school students, their parents, and high school counselors self-reported views about the nature and relative importance of different aspects of "College Preparation Knowledge." In brief, this research investigated many areas of College Preparation Knowledge (CPK) broadly defined as the facts and the processes needed to be known to be prepared to successfully apply, attend, and graduate from college. Practical suggestions derived from the research findings may help the high school counselor better serve their college-bound students and parents. [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.]