Research continues to support the positive link between teacher collective efficacy and student achievement. The purpose of this study was to better understand how principal leadership behaviors affect teacher collective efficacy beliefs. The study was designed around Goddard, Hoy, and Hoy's construct of teacher collective efficacy, which is grounded on Bandura's efficacy constructs. The sequential mixed-methods study was designed to examine the perceptions of teacher participants from one Texas Title I middle school regarding principal leadership behaviors. A case study approach was used to construct meaning from teachers' perceptions about the effects of principal behaviors on teachers' beliefs regarding the components of collective efficacy. The quantitative portion of the study (a survey) examined teacher perceptions of their collective efficacy beliefs regarding various facets of the school organization. The qualitative portion (focus group and individual interviews) centered on what teachers perceive to be the impact of principal leadership behaviors on their teacher collective efficacy. Findings from the quantitative portion of the study suggest that teachers perceive their levels of collective efficacy to be higher when reflecting on factors that are primarily connected to school, like learning, motivating students, and handling student discipline issues. Findings from the qualitative portion of the study suggest that when principals exhibit collaboration, empowerment, relationship building, and trust, teachers perceive the leader to be effective. The study was limited to one Title I middle school so an extension to the study which would include other middle or additional high schools is recommended.

By building self-efficacy in individual teachers and collective efficacy in grade level teams, principals can improve the instructional practices that take place on campuses. Instruction impacts student achievement. Principals indirectly impact student achievement through instruction that happens in the classroom. The purpose of this mixed methods study was to examine the relationship between the behavior of instructional leaders and teachers' self-efficacy and collective efficacy. Data collection tools included a survey, semi-structured interviews, and observations of interactions and behaviors of teachers and principals at two Title I elementary schools in a large suburban school district in the Dallas-Fort Worth metroplex. Teacher self-efficacy and collective efficacy were seen through the lens of classroom management, instructional strategies, group competency, student engagement and task analysis. Teacher efficacy at both schools were influenced by leadership behaviors through direct and indirect actions. Instructional leaders must be adept at using tools, such as PLCs and walkthroughs, to contextualize the needs of all stakeholders and bring about high levels of efficacy in teachers and student achievement.