This paper reviews Teacher Professional Development (TPD) programs in Sri Lanka and the influences of TPD to develop teacher effectiveness and school improvement. Teacher effectiveness and school improvement are directly affected to quality of learning outcomes of the students. For this review paper the information were collected through relevant documentary, books, journal papers, websites, hand books and other related policy papers, finally analysed the collected information. This paper identified through the literature some models which related to teacher effectiveness. Further, some important activities were found in the reviewing process of the TPD programs in Sri Lankan context, these activities highly affected to teacher effectiveness and school improvement. Finally some recommendations were discussed in the paper which are should be important for further development of the Teacher Professional Development (TPD) programs in Sri Lanka.