Efficacy - or a teacher’s level of confidence in their abilities - can be highly influenced by past experiences or your current school culture. For example, a bad classroom experience or negative work environment can quickly diminish a teacher’s confidence.
Interestingly, seeing students grow and working in a collaborative environment can boost a teacher’s belief in their ability and improve performance. Research also suggests that teachers with a strong sense of self-efficacy tend to be better planners, more resilient through failure, and more open-minded and supportive with students.