This report aims to present an assessment of the impact of the "Training of Trainers -TOT" courses which have been conducted since 1997. The long-term effects of TOT programmes were assessed through a self-filled questionnaire given to the course participants following a minimum period of six month after completion of the TOT course. The 86 participants were medical teachers from the İstanbul Faculty of Medicine were included in this analysis. Twenty percent were instructors, 38 % were associate professors and 42 % were full professors. Seventy two percent of the medical teachers stated that they were able to implement the knowledge/skills they had acquired during the TOT course in their teaching. The majority of participants who attended the course reported more feedback from the students and enhancement of student-faculty interaction. While these results appear to be promising and seem to indicate thal TOT courses have a long lasting impact, one must not forget that these results are based on the views expressed by the teachers. However, these courses doubtless serve to motivate the teaching staff and to provide them with opportunities for more efficient teaching.