What is the least reliable method for assessing a teacher's skills?

When considering the reliability of methods for assessing a teacher's skills, self-assessment stands out as the least reliable option. This is primarily because self-assessment relies heavily on the individual's perception of their own abilities, which can be biased and influenced by a range of factors, including self-esteem and personal reflections. While teachers may have insights into their methods and practices, their assessments may not accurately reflect their effectiveness in the classroom.

In contrast, directed observation, peer observation, and feedback from students provide more objective insights. Directed observations are typically structured and can focus on specific teaching techniques or strategies, offering a more detailed look at a teacher’s performance. Peer observations involve collaboration and feedback from colleagues who are familiar with teaching practices, which can enhance the assessment's validity. Feedback from students can highlight how well a teacher engages and communicates with their students, adding another layer of perspective to the evaluation.

Therefore, while all assessment methods have their strengths, self-assessment tends to be the least reliable due to its subjective nature.