The investigators were purposively selected four wards with the highest prevalence of obesity out of 30 wards that were surveyed in the previous study (PR-13024) conducted by Centre for control of chronic diseases (CCCD), icddr,b. Investigators were obtained the list of schools from city corporation head office for the 4 selected wards. Investigators were randomly selected 2 English medium and 2 Bengali medium schools from the available list. Investigators were included only those schools who will give us a letter of supports for their voluntary participation in the research project. We were followed the available list of both Bengali and English medium schools collected from City Corporation. If any school disagrees to participate in the research, we were approached next available school in the list and selected following a letter of supports.