The study aims to analyze the efficiency of developing soft skills with the use of project technologies. The relevance of the study owes to the need for developing soft skills in the younger generation. This need relates to the increased demand for communication and teamwork skills in specialists. The emphasis on these skills is especially topical in school education, where their development via project activities facilitates meaningful interpersonal interaction between project participants. The established goal is achieved in the study through a set of theoretical and empirical research methods, including the analysis of literature on soft skills development, including in the context of the school educational environment, and a pedagogical experiment to test the efficiency of project technologies in developing the soft skills of high school students. The obtained findings indicate a positive dynamic in the soft skills of high school students taught using project activities. For this reason, the study stresses the need to substitute the passive traditional pedagogics limited to the transmission of knowledge with active pedagogics.