The purpose of this mixed methods study was to explore how perceptions of team strengths and weaknesses present in school district leadership teams, as conceptualized by Patrick Lencioni: a team's ability to 1) trust, 2) commit, 3) handle conflict, 4) be accountable, and 5) be attentive to results. Additionally, this study sought to identify variables--male to female ratio, median age of team members, age range of the members, median years of experience in administration, position or rank on the team, and the size of the team--and determine how those variables affect perceptions in each of the team constructs. The results from this study may assist future leadership teams in identifying the relationship among team strengths, areas of growth, and team demographics. Recommendations and explanation for team results are based on superintendent interviews. Therefore, teams can create an action plan and work on identified areas of growth as well as celebrate strengths. The study's participants were a selection of administrative teams in Illinois school districts. School district leadership team members have the important responsibility of making educational and financial decisions that affect the quality of instruction and the social-emotional support students receive, all of which affects students' education. Following analysis of the quantitative data, interviews sought to answer the question of how teams are overcoming their perceived weaknesses. In order to achieve this objective, the following research questions guided this mixed methods study: (1) To what extent are trust, conflict, commitment, accountability, and attention to results present on school district administrative teams?; (2) To what extent are demographic characteristics at the individual and group level related to perceptions of team trust, conflict, commitment, accountability, and attention to results?; and (3) In what ways have school district administrative teams addressed the constructs of trust, conflict, commitment, accountability, and attention to results? This mixed methods study followed the explanatory sequential design and first analyzed quantitative data using a survey format. Using quantitative conclusions, qualitative data sought to explore the findings with deeper understanding by conducting interviews. The results of this study will allow school district administrative teams a method in order to examine their own team's strengths and weaknesses and learn from others on how to overcome areas of growth. This study found that the constructs, as prescribed by Patrick Lencioni, were present on district leadership teams in varying degrees. Additionally, results indicated that variables, such as age range and position or rank on a team, had significant findings. The wider the age range, the lower the team perceived their functioning in the constructs of trust, accountability, and attention to results. When examining each of the five constructs, a participant's position on the team influenced their responses. Superintendents and assistant superintendents scored higher in each construct than district office staff and principals. Additionally, district office staff scored higher in each construct than principals. Results indicated team members' perceptions varied based on each members' position. Data analysis revealed unexpected findings relating to the teams' overall constructs means, superintendents' gender, the hiring practices of districts, and superintendent longevity. Moreover, through themes that emerged, the importance of open and honest conversations and the influence of relationships were evident. [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.]