Adolescence is a phase of rapid growth and development during which physical, physiological and behavioural changes occur. They constitute more than 1.2 billion worldwide, and about 21% of Indian population. Morbidity and mortality occurring in this age group is mostly due to preventable causes. Adolescent risky behavior often results from their inadequate knowledge and lack of understanding of the risks involved. Aim: The aim of the study was to assess the effectiveness of video assisted teaching on the knowledge and perception on high-risk behaviours among adolescent boys. Materials and Methods: Experimental design was used. By using systematic random sampling 40 students studying from 6th, 7th and 8th standard were selected. Results: Maximum number of students were in the age group of 12 years (42.5%). Half of the students were studying in 7th standard (50%), Maximum students were residing at rural areas (60%). Majority of the students 31(77.5%) were Hindus. 12(30%) of the student’s fathers were smokers, 16(40%) of the student’s fathers were alcoholics. The mean knowledge score in the experimental group after the intervention (16.1) was higher than the mean knowledge score before the intervention (9.5). The mean perception score in the experimental group after the intervention (85) was higher than the mean perception score before the intervention (78.8). Conclusion: Smoking prevention is an important issue and healthcare professionals, especially nurses have a major role in helping people to understand the consequences of smoking for their lives.
