Schools are in place to provide for the education of students across the nation. In trying to ensure all students have equal opportunities, both state and federal government have instituted policies which direct and influence what and how the curriculum is taught across the nation. Teachers are compliant in following these guidelines, as district adopted curriculum aligns with accountability measures. However, when teachers are encouraged to innovate instructional practices specific to the needs of their students, success follows. Further, when processes are in place to allow teachers to innovate collaboratively, collective teacher efficacy is enhanced. Research shows that collective teacher efficacy is a top indicator of student achievement. The purpose of this mixed methods action research study was to identify if teacher-initiated innovations, enacted through collaborative inquiry cycles, would increase teachers’ self- and collective efficacy and how the sources of efficacy may have contributed. While quantitative data did not show statistical significance, aggregated qualitative data indicated otherwise. Through the process of using collaborative inquiry cycles, teachers were more intentional with their instruction, were positively influenced and impacted by their peers, and they felt successful. These are behaviors that lead to higher levels of collective efficacy.