AbstractInjuries are common in sports. Sports injuries result from accidents and due to poor training practices, improper equipment, lack of conditioning, or insufficient warm up and stretching. Each year more than 3.5 million sports-related injuries requiring medical treatment occur in children under age of 15 years.1 a structured teaching programme on sports injuries among high school children is important to make them aware of the sports injury which will enable them to prevent complications. Objectives of the study were to determine the knowledge of sports injuries among high school children by using structured knowledge questionnaire, To evaluate the effectiveness of structured teaching programme on sports injuries among high school children. And to find out the association of knowledge score of high school children's regarding sports injury with selected demographic variables the findings of the study revealed marked increase in the knowledge level of the high school children. The pre- test and post-test knowledge score of the high school children ranged from 8-19 and 18-26 respectively. In the pre test, majority (91.7%) of the high school children had moderately adequate knowledge, whereas in the post-test, majority (90%) of the high school children had adequate knowledge on sports injury. The mean pre-test knowledge score was 13.6+2.68 and mean post test score was 23.16+1.99. Area wise mean percentage knowledge score in pre test were minimum in the areas of classification (42.99%) and management and prevention of sports injury (36.07%). In the other area the mean pre-test knowledge score was above 60% whereas, in the post test knowledge scores in all the areas was increased, 'introduction' (87.55%), 'classification' (80.91%) and 'management and prevention of sport injury' (70.92%). There was significant association between levels of knowledge score and selected demographic variable like gender (x2=5.38*). There was no significant association between age (x2=5.92), class of study (x2=4.75), religion (x2=0.00), suffering from sports injury (x2=0.58) and previous knowledge on sports injury (x2 = 0.71) at 0.05 level of significance. Keywords: Sports injury; High school children; Structured Teaching Programme.