School counselors have potential to make significant gains in closing the achievement gap for all students as advocated for by the American School Counseling Association. School counseling is moving away from the no-model model of services delivery that places counselors at the whim of principals, parents and teachers who traditionally define counseling duties according to their needs. Instead, it is moving toward a school counseling framework advocated for by national and state organizations. A core concept of these frameworks is the use of evidence-based practices to meet the needs of all learners. Motivational Interviewing (MI) is an evidence-based counseling practice developed to assist with resolution of ambivalence and behavior change. Researched throughout the world in a variety of settings from the health professions to prisons, the results show promise in MI for assisting with behavior change in both adult and adolescent populations. MI training is currently available to school counselors at conferences, school district trainings and through self-study. There is little research on the efficacy of MI and school counseling training and implementation. The purpose of this dissertation is to produce two manuscripts related to school counseling and MI. Using a concurrent multiple baseline design, this study focused on the impact of MI feedback and coaching supervision of school counseling graduate students (N = 3) with previous beginning MI training in a two day workshop. The hypothesis stated that subsequent feedback and coaching supervision improved school counseling graduate students' global rating scores and improved the percentage of MI adherent behavior on the Motivational Interviewing Treatment Integrity (MITI 3.1). The global rating scores increased with feedback and coaching supervision and the participants moved from levels of beginning MI competency to proficiency in their mean scores. Participants did not, however, increase the percentage of MI adherent behavior. These score began high and remained high throughout the 10 week duration of the research. Implications for this study include highlighting the importance of feedback and coaching supervision for school counseling graduate students wanting to increase beginning MI skills, and it marks the beginning of research on training and implementing MI in school counseling programs. [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/en-US/products/dissertations/individuals.shtml.]