This dissertation explores the theme of applying video-based instruction on employment skill acquisition among secondary students with intellectual and developmental disabilities (IDD). It consists of an introduction, three stand-alone papers, and a research statement. Chapter 1 presents the overview of the current competitive integrated environment (CIE) among individuals with IDD and video-based instruction which lays a foundation for the development of Chapters 2 and 3. Chapter 2 presents a literature review on the efficacy of VBI on employment skill acquisition of secondary students with IDD. Chapter 3 extends this literature by describing an experimental analysis of self-directed video prompting on vocational skills. Chapter 4 is a practitioner paper that maps a framework for preparing and implementing self-directed video prompting. Chapter 5 provides a research statement that discusses how my project findings fit in with the current literature and how my future research will contribute to promoting CIE of individuals with IDD. [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.]