Abstract: Psychosocial problems are highly prevalent and one of the hidden public health problems amongst children and adolescents. The present Pre Experimental (one group pre-test post-test design) study aimed to evaluate the effectiveness of Video Assisted Teaching on psychosocial problems of adolescents in terms of knowledge and attitude among school teachers, Coimbatore. 60 school teachers working at Rathinapuri Corporation Higher Secondary School were selected by using Non-Probability Convenience Sampling Technique. Self-administered questionnaire and Likert scale was used to assess the level of knowledge and attitude Calculated paired ‘t’ test value of knowledge (t=29.9) and attitude (t=20.1) showed highly significant at p≤0.01 in pre and post-test, which reveals that Video Assisted Teaching was effective in gaining knowledge and developing favorable attitude on psychosocial problems of adolescents among school teachers. The calculated Karl Pearson’s ‘r’ value (r=0.7) of knowledge and attitude in the post-test showed a positive correlation. Video-Assisted Teaching is an interesting effective way of teaching-learning strategy that can be used at any place, time, all the age group for improving knowledge and developing a desirable attitude.