In this research, it is aimed to determine the opinions of middle school students about STEM activities. The research, which used case study from qualitative research designs, was conducted in 2018-2019 academic year. The research working group is composed of 27 middle school students studying in a private school in Turkey. In the data collection, semistructured interview forms prepared by the researchers were used. The data were analyzed in accordance with the descriptive analysis. According to the findings of the research, it was determined that STEM activities were related to daily life problems, and that students' lessons, occupational preferences and communication skills were affected. In addition, lack of time and material and lack of information have been found to have problems in the realization of STEM activities.