The present investigation delves into the efficacy of professional development programs (PDPs) in augmenting the competencies, expertise, and output of teachers' effectiveness in their professional settings. The goal of the study is to offer a thorough assessment of the efficacy of professional development programs (PDPs). With the aid of the NCERT tool for evaluating training program effectiveness and the perspectives of in-service teachers regarding the results, the survey instrument is made to evaluate the efficacy of teacher training programs on 49 samples. The research's conclusions advance knowledge of professional development programs. INSETs, according to 66.7% of teachers, help them become more proficient educators. 85.4% of respondents said these training courses were pertinent to their needs. Respondents learn things from the insets that they were previously unaware of. With the aid of training programs, instructional methods have increased and insets assist in improving their subject matter competencies. For the organizers to create and put into action professional development programs that successfully support teachers' professional development, more research and improvement are required, as indicated by the participants in the study's weakness section. The larger sample size might also be taken into account for upcoming research.