The aim of this research is to evaluate the effect of the project titled “Youth with Values, a Responsible Society and a Clean Environment” conducted with secondary school students. The study group of the research consists of 9 inclusive students (3 girls, 6 boys) and 9 students with a high academic success (4 girls, 5 boys) making up a total of 18 secondary school students. The study was conducted within the framework of the embedded pattern from the mixed patterns, in which quantitative and qualitative research methods were handled together. In the study, while the “Attitude Scale towards Values” and the “Value Determination Survey” were used as the pre-test and post-test as quantitative data collection tools; the open-ended questionnaire, focus group meetings and the data gained from the diaries of the participants were used as qualitative data collection tools. According to the results the project increased their scores according to the last measurements in the scales of attitudes towards the values. also, a significant difference was determined in the sub-dimensions of “environment and nature”, “responsibility”, “cultural values” and in the overall total of the attitudes towards values scale. Examining the qualitative data of the current research, it was found out that students had fun, made new friends and learned many new things about the nature and environment during this project. Furthermore, groups’ opinions about the contribution of the project were classified as "cognitive awareness", "emotional awareness" and "behavioral awareness".