The professional learning community (PLC) model for enacting school improvement through ameliorated educator leadership efficacy and instructional proficiencies has become one of the most popular methods for encouraging higher student achievement in public schools across the State of Missouri. By reviewing the current educational research on the successful implementation of PLCs, the project team extrapolated seven dimensions of high functioning learning communities, derived from the work of Dr. Rick Dufour, Dr. Becky Dufour, Dr. Robert Eaker, Dr. Shirley Hord, Michael Fullan, and others. The team used these dimensions to develop and pilot a quantitative survey that explored the extent to which participating educators reported fulfilling a common mission, sharing leadership, achieving continuous improvement, engaging in collective inquiry, focusing on results, creating support structures, and building a collaborative culture. The pilot survey also focused on the implementation of each of these dimensions by asking respondents to identify the factors that spurred or inhibited growth in each area. The project team piloted this survey in 13 public school districts in Missouri that provided responses from teachers and administrators in 5 district office buildings, 13 high schools, 14 middle schools, 21 elementary schools. Each of these schools had implemented a PLC for more than one year. Using a problem-based learning approach to the topic, the project team compared the respondents' reported behaviors with the best-practices outlined in current educational research. Based upon the findings in each of the seven dimensions, the project team offers recommendations to school leaders to improve implementation of these fundamental elements professional learning communities in their schools. [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.]