Background: Rapid changes occur in the areas of the body, mind, and social interaction during adolescence. It is the period during which one becomes somebody prepared to play an adult role in every aspect of life, involving developing their attitude and habits2. More than 50% worldwide population is the below age of 20 years. According to the World Bank as reported that nearly 82 thousand to 99 thousand children and adolescents all over the world begin smoking daily. If present tobacco smoking trends continue, almost 252 million adolescents will die from tobacco use1. Every two seconds, one adult Indian die from a tobacco-related disease, and one adult Indian tries tobacco for the first time.2 The study investigate the effectiveness of teaching learning modules on smoking and its hazards among adolescent boys studying at Polytechnique college in Bengaluru. So, education will improve the attitude and increase awareness in relation to health status and help to prevent smoking3. Research methodology: the research design adopted for this study was a quasi-experimental design and the research approach was an educative approach, the sample consisted of 100 adolescent boys aged between 18 - and 21 years studying at a polytechnic college result: the result of this study shows that pretest percentage knowledge score was 10.88(43.5%) and the posttest knowledge score20.34(83.4%), consequently, there was a greater comparison between the percentage of smoking and its risks at the pretest and post-test. Compared to the pre-test, the mean post-test knowledge score was substantially higher overall. At the P = 0.001 level, the paired student t-test result of 32.47 was significant. The chi-square test shows that there is a significant association between post-test knowledge scores between residence, type of family, and occupational status of the mother. Evidencing a potent tool in curbing adolescent smoking, the study underscores the imperative of comprehensive educational initiatives targeting youth populations. By equipping adolescents with pertinent knowledge, such interventions hold promise in fostering a tobacco-free generation. Conclusion: The study has significant implications for teaching learning modules on smoking and its hazards among Polytechnique students in Bengaluru effectively increasing student’s knowledge, its underscores the importance of educational interventions in combatting smoking – related health risks. Finding suggest the need for further research to replicate the program’s success with more rigorous study design, and long-term effectiveness evaluations are recommended to establish the sustained impact of such intervention over time