Prior to this study being conducted, it was not known how teachers describe the PLC collaboration among teachers and school leaders that supports faculty development. The purpose of this qualitative case study was to explore how teachers in Texas describe the PLC collaboration among teachers and school leaders that supports faculty development. Using two instructional leadership models as the theoretical foundation, two research questions were formed: (1) focused on how teachers describe the collaboration with other teachers during PLC for faculty development and (2) focused on how teachers describe the collaboration with leaders during PLC for faculty development. Purposive sampling was employed to select the 21 teacher participants. Semi-structured interviews, observations of PLC meetings, and a focus group were used to answer the research questions. Braun and Clarke's approach to thematic analysis was used to analyze the data. Data analysis revealed four emergent themes that answered RQ1 and RQ2. The results of this study showed that: (1) teachers exert great efforts to create a collaborative PLC environment to enhance professional growth and (2) the efforts exerted by school leaders to create a collaborative PLC environment are essential to teachers' professional development, supporting theme 1.1, "teacher's effort to create a collaborative PLC environment" and theme 2.2, "leaders' effort to support teacher's professional development." These findings will provide data for school leaders at secondary campuses about PLC constructs needed to support faculty development. It is recommended that school leaders commit to restructuring PLCs, focusing on the collaborative efforts needed to develop faculty that ultimately improves student achievement. [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.]