A third challenge of measuring teaching effectiveness is that it requires appropriate and valid methods and tools that can capture and analyze the various dimensions and indicators of teaching quality. Some of the common methods and tools include student evaluations, peer observations, self-reflections, portfolios, rubrics, surveys, interviews, focus groups, and classroom assessments. Each method and tool has its own advantages, disadvantages, and implications for teaching practice and improvement. For example, student evaluations can provide useful information on student perceptions, opinions, and suggestions, but they may also require careful interpretation, contextualization, and follow-up. Similarly, portfolios can showcase teaching achievements, accomplishments, and evidence of impact, but they may also require considerable time, effort, and guidance to create and review. Therefore, measuring teaching effectiveness requires a systematic and rigorous process that selects and applies the most suitable and reliable methods and tools for each teaching context and purpose.