Evaluating Teachers’ 21st-Century Skills to Support Sustainable and Quality Education

Researching teachers’ 21st-century competences is critical for developing a sustainable, quality educational environment and accomplishing the objective of quality education. A lifelong learning philosophy ensures teacher development, paving the way for quality education (SDG4). In this study, a valid and reliable scale was established to provide the target group of middle school teachers with 21st-century abilities to enhance their quality teaching process and long-term professional growth. In this context, the developed scale has 33 items. The factor analysis results revealed that the scale is three-dimensional and accounts for 63.66% of the overall variation. Furthermore, second-order confirmatory factor analysis confirmed that the proposed model satisfied the acceptable fit criteria. Positive correlations between factors were observed, and reliability analysis revealed a high internal consistency (α = 0.947), thereby validating the scale’s reliability, validity, and practical utility. In conclusion, the scale developed is a valuable assessment tool for assessing teachers’ 21st-century skills, and the data gathered from it can help improve secondary teacher quality and create professional development programs. In this regard, contributions will be made to the development of long-term policies. Teacher development should be considered critical to achieving “quality education”, which is one of the Sustainable Development Goals.