The aim of this study is to improve the social and environmental awareness of secondary school students through the extra-curricular activities and to identify their opinions on their experiences in this process. The activities organized in this context include the observations of social environment in which students live, identifying major environmental problems in consultation with local residents and designing of banners on this subject. Designed as an exploratory research, the current study employs 34 grade seven students attending the same class in a public middle school in Manisa province in 2014-2015 academic year as its study group. Each student conducted an interview with one of their relatives or acquaintances to find out the most important environmental problems experienced by the residents of Manisa. After voting the results of interviews by the students, the most important environmental problems are identified as garbage problem, lack of parks and the green areas and the air pollution. Students, seperated into groups, determine their topic of posters and demonsrate them at the school after the project. The first three posters were exhibited on billboards by the municipality and the others were exhibited at the school. At the end of the process, focus group interviews were conducted with the groups of students participated in the procedures given above. The results obtained from the interview data concludes that there has been an improvement in students' environmental awareness and sensitivity as well as development in their cooperative working and social participation skills.