The findings of this study serve as an exploratory case-study examining the conditions of professional learning for in-service principals in one north Texas suburban district with changing student demographics. Quantitative and qualitative analysis of a variety of data collected sought to reveal how professional development of principals increased a principal's contingent leadership skills to positively affect student achievement through school improvement efforts. Perceptions were examined from the sample of seven executive directors at the district level; six campus principals (two elementary, two middle, and two high school); and eight teachers selected from among four of the six campuses whose principal participated in a semi-structured interview. Additionally, responses from a principal survey were examined. Findings were organized around three themes that surfaced from the deductive and inductive analysis of data collected in response to the three research questions. The themes were: instructional leadership and other principal responsibilities, principal professional development and components of professional learning, and measuring the effectiveness of principal professional learning. Findings revealed that there are many offerings of professional development opportunities available to principals in Learning ISD. The components essential in effective principal professional learning opportunities in the studied district consisted of embedding social capital, professional capital, and decisional capital to develop contingency leadership skills. Measuring the effectiveness of principal professional learning remains an area of growth for the district studied as well as the adherence to a meaningful principal evaluation system that can properly quantify and qualify a campus administrator's effect on school improvement and student learning. [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.]