The importance of teacher collaboration and professional growth are highlighted by their inclusion in the 2015 Every Student Succeeds Act (ESSA). In ESSA, it is recommended that teachers are provided with opportunities to collaborate and participate in learning communities. The purpose of this action research study was to address the problem of practice of a lack of teacher collaboration and professional learning community (PLC) at Sun Valley High School (SVHS); a 9th-12th grade public school in southern California. Through previous cycles of research, an online collaborative space to foster and support teacher collaboration was created; the PLC Team Hub. This study examined the attitudes and experiences of three teachers participating in a first-year, cross-curricular PLC Team and their interaction with the PLC Team Hub. Data gathered includes survey data, teacher interviews, audio of PLC Team meetings, teacher-generated artifacts, and digital researcher journal. Results suggested that the PLC Team Hub was effective in facilitating teacher collaboration and communication for these teachers. Further, teachers reported that they observed evidence of cross-curricular student engagement and learning as a result of their participation in the PLC Team Hub. Recommendations focus on the future of the innovation and the need for institutional and administrative support to continue the PLC Team Hub at SVHS. [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.]