Social media are new ways of communication and socialization of society. Children and young people have routine of checking social media more than once a day which they use for communication and entertainment purposes. The goal of this masters thesis is to determine how social media affects the habits and everyday life of high school students, that is, how social media have changed their relationship to learning and leisure. Three key hypotheses are examined: the difference in the amount of time spent on social media between pupils of a smaller and larger city, the use of social media for the exchange of learning materials, the finding of educational content and free activities of high school students. The survey was conducted on high school students in two cities - Ivanić Grad and Osijek in two high school classes. The results show that there is a difference in spending time on social media between the students of these two cities. They use social media equally at the same time in a period of two to three hours, and we see a difference in the four hour period where we see that the students of a smaller city access social media more. At the same time, the students of a smaller city are more present on social media and during classes, but despite this, they access more educational content on social media than the students of a larger city. Leisure is filled with dating, sports activities, hobbies, and social networking. There are tiny differences between the students of a smaller and bigger city, but mostly there are minor differences. Since students of both cities depend to a large extent on social networks.