Equipping teachers with the appropriate knowledge and skills to integrate technology effectively into their practice is a key component of school-wide technology implementation. Technology is fast becoming ubiquitous in the realm of education. Teachers and schools struggle to keep abreast of changing technologies while preparing students for a 21st century workforce. The Partnership for 21st Century Skills defined four skills critical for success in the twenty-first century: communication, collaboration, critical thinking, and creativity. School and district leaderships are tasked to provide relevant and meaningful technological professional development (PD) in order to prepare their teachers to integrate these skills into their teaching practices. Hence, quality technology professional development is essential in modern education. In this study, an instructional technology specialist examined the effects of professional development on teachers' high-level technology integration. [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.]