Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 15 1-4 1986 12 15 31 40 S.Tahvildari P.Nowzari K.Mohammad 2015 10 03 In this study, for the first time in Iran, the application and effectiveness of two educational methods of" traditional lecture" and " lecture along with filmstrip projection", on the level of personal health knowledge of students studying at third grade of girls guidance school in the 7th educational district of Tehran was compared. The "Experimental design" was chosen for conducting this research in order to have a more suitable ground for understanding causal relationships. In order to consider both, the effects of the primary measurement and also the effects of the simultaneous factors, the experimental design was applied. A control group was also included in the experiment. The results of this study showed that the "lecture along with filmstrip projection" was significantly better and more effective that "traditional lecture" method of education in increasing student's health knowledge in relation to personal health contents. It was also concluded that the "traditional lecture" method of education has had significantly more effects on increasing student's health knowledge as compared to control group (without receiving health education) in relation to personal health. https://ijph.tums.ac.ir/index.php/ijph/article/view/2760 https://ijph.tums.ac.ir/index.php/ijph/article/download/2760/2740