This study explored the effectiveness of professional development programmes among teachers in Nigeria, especially the alignment of professional development programmes to the professional needs of teachers, the level of institutional support, and the consistency of government policy frameworks.  The main goal of the investigation was to outline the main barriers that hinder the effective implementation of professional development strategies and to evaluate the role of institutional and state-level support mechanisms in enhancing results.  The study was informed by the Social Learning Theory (Bandura, 1977) which highlighted the importance of social interaction and feedback loops in promoting learning.  The study used a qualitative paradigm, which involved document analysis and literature reviews of available reports and academic research on the topic of teacher development in the Nigerian context.  The findings showed that professional development programmes often did not respond to the unique issues that teachers face in their classrooms, particularly in rural areas. Inequality in institutional support, such as mentorship and peer collaboration, was also apparent, and governmental policies were seen to be disjointed, thus hindering successful implementation. In addition, the absence of long-term funding and follow-up also limited the effectiveness of PD efforts.  Conclusively, the research found that effective professional development in Nigeria requires a more direct connection to the needs of teachers, institutional reinforcement, and long-term governmental investment. In this regard, the researchers recommended that, at all administrative levels, the state must align PD curricula with local demands and actively include teacher feedback. It is still necessary to strengthen institutional support structures, in particular, mentorship schemes and collaborative networks.