In current research, it was aimed to determine the interests and opinions of the 4th grade Science course taught with STEM implementations. The implementation of the study was carried out in the second semester of the 2017-2018 academic year in 4thgrade of a Primary School in Emirdag district of Afyonkarahisar. The study was designed in the form of action research. As data collection tools STEM Professional Interest Scale and semi-structured interviews were used. In the study, it was determined that STEM implementations positively increased the interest, perception and attitudes of students towards STEM occupations. At the end of the implementations the students perceive the fields of science, technology, engineering and mathematics as integrated; It is concluded that students find STEM activities interesting and entertaining, increase their motivation, are happy and increase their interest in STEM professions.