Research on informal teacher evaluation reveals the predominant evaluation method is the walk-though, which ranges from a brief 2- to 3-minute snapshot to longer observation. Studies support the important role principals play in instructional leadership but also suggest that principals are not good at identifying which teachers are the best instructors. Research finds that principals overwhelmingly understand the need to sample teacher performance but that they are rarely trained in how to accomplish this.
Citation: Cleaver, S., Detrich, R., & States, J. (2019). Informal Teacher Evaluation. Oakland, CA: The Wing Institute. Retrieved from https://www.winginstitute.org/staff-informal.