In the 21st century, there is a growing realisation that providing principals with the necessary opportunities of training in leadership and management skills has become increasingly important as a way to increase school effectiveness and achieve quality performance. Central to this argument is the fact that principals are merely accorded a status and role without the necessary training. The purpose of this study was therefore to explore the effectiveness of state-funded professional development programmes of school principals with specific reference to Soshanguve secondary schools and also to ascertain the extent to which principals’ training meets the schools’ and principals’ needs given the changed conditions that exist in the country. The study employed a quantitative research methods approach to collect data from 100 educators and 20 Head of Departments (HoDs). This was done through administration of questionnaires. Data was analysed using the Statistical Package for the Social Sciences (SPSS), which was used to generate the frequencies and descriptive statistics that were used to answer research questions. While it is expected that principals should effectively and rigorously be developed to enable them to improve teaching and learning at their schools, the study, however, found that training of school principals in Soshanguve was elusive and ineffective, and as result, the majority of these principals lack basic management training prior to and after their entry into principalship. The study has shown that apart from being faced with various challenges and being promoted to principalship without the necessary leadership experience, principals rely on trial-and-error experience and common sense in leading and managing schools. The study also showed that a majority of principals are in great need of being professionally developed in some specific areas. Furthermore, the study discovered that the Department of Basic Education does not seem to be making efforts in ensuring that principals are professionally developed. Consequently, principals develop on their own through informal professional development strategies. In conclusion, the study recommended, amongst others, that principals should be encouraged to take personal responsibility and initiative in preparing and developing school leadership through self-study, reading literature, attending seminars and workshops out of their own personal volition. That Department of Basic Education (DoBE) needs to look into ways of subsidising the training of school principals. DoBE should also find ways of formally incorporating more of the private sector and non-governmental organisations to help in the preparation and development of principals for school leadership by allowing them to offer in-service courses for potential principals and serving principals. / Educational Leadership and Management / D. Ed. (Education Management)