One of the relevant and insufficiently developed topics in modern education is the use of a media-educational approach in the education of prosocial behavior of schoolchildren. The purpose of the article is to study the prosocial content of the popular VKontakte media resource, as well as to identify the attitude of teenagers to posts asking for help in social networks. Research methods: analysis of scientific literature, quantitative and qualitative analysis, focus group method. The sample included students of grades 8-9 (n = 34 people). As a result of the study, it turned out that the most popular areas of prosocial activity in VKontakte among subscribers are calls for help to animals and solving environmental problems. Schoolchildren are interested in charity content, especially presented in photo, video, and short personal history formats, but they do not read posts that cause negative emotions and, in general, do not trust calls for help. Most teenagers call helping another person an important thing, sharing the humanistic principles of helping. Due to the popularity among schoolchildren, social networks are an effective tool for broadcasting altruism, empathy, values of helping other people and society, which allows them to be used in media education of prosocial activity of adolescents.