In an effort to make science, technology, engineering, and mathematics (STEM) careers more available to underrepresented minorities, informal science programs must continue to develop to heighten science and other STEM-based interest. These efforts have been challenged through programs offered at out-of-school-time (OST) facilities, referred to as Field Based Science Institutions (FBSI). For example, museums, zoos, aquariums, and botanical facilities have been involved in promoting STEM exposure to underserved youth. This study included past participants from randomly selected OST/FBSIs and data was collected from surveys completed by the participants. Through qualitative measures, gathering data, and evaluating the success of such programs, the results indicate that FBSIs that provide OSTs play a vital role in increasing underrepresentation in STEM fields. These programs positively impact urban minority youth and affect STEM pathway choices. [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.]