This monograph presents the findings of a research study that examines the selected current media education problems in lower secondary pupils and their relations to said media, with the emphasis on social networks. Specifically, the research focuses on what source of information pupils use the most frequently, whether they verify the veracity of the information, photographs and user profiles on social networks and according to which criteria they decide, whether they are able to recognize, based on real examples, disinformation, hoaxes, false internet profiles and photographs, product placement, sexism in advertisements, surreptitious advertising, media stereotypes, cyberbullying and public service media, whether pupils are affected by influencers they follow on social networks.