Community colleges are open access institutions, striving to meet the needs of all students regardless of level of academic preparation or achievement. Community college student enrollment continues to rise; however, the success of community college students has not increased accordingly. A significant number of students begin at community colleges academically underprepared, placing into developmental level courses in English, reading, and math. Success rates for students in developmental level courses, however, lag behind success rates of students enrolled in college-level courses. To improve course success rates and the overall success of students in developmental level courses, I designed a professional development experience to strengthen developmental education faculty members' social capital, connecting faculty with peers who also teach developmental level courses. Twelve full-time faculty members participated in an interdisciplinary Professional Learning Network (PLN), where they engaged in shared critical dialogue and conducted and received a peer observation. I designed a mixed methods action research study where participants completed a pre- and post-survey measuring the influence of this professional development experience on their social capital and their use of effective teaching practices. Additionally, participants completed reflective journal responses, and I interviewed six participants to determine if participation in the PLN and conducting and receiving an interdisciplinary peer observation would transform their teaching practice. Quantitative results indicated that participation in the PLN had little influence on developing participants' social capital and little influence on transforming teaching practice. The qualitative data indicated that participants' confidence in their teaching practice increased. Participants' social capital was strengthened as they developed an informal support network that grew from a sense of trust and common purpose. Furthermore, interacting with instructors from a different discipline expanded their ideas about effective teaching practices. Ultimately, participation in the PLN and conducting and receiving a peer observation led some participants to consider a transformation of individual teaching practices and in a few instances, modifications to teaching philosophy. [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://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]