This project, focusing on personal development for leaders, explores the multifaceted roles and responsibilities of teachers within an organization, emphasizing their impact on the institution's structure, function, and overall success. The assignment delves into the concept of professionalism in teaching, analyzing it through various perspectives including traditional, conflict theory, neo-liberal, and critical perspectives. It highlights the essential attributes and skills of effective teachers, such as enthusiasm, leadership, organizational abilities, and interpersonal skills, while also examining their roles in planning, implementation, assessment, and administration. Furthermore, the project investigates the influence of teachers on their organizations, emphasizing their contribution to productivity, student growth, and the overall educational environment. Finally, the project addresses professional development, including various models and their application to teachers' needs, while incorporating relevant references and appendices to support the findings.