The development of civilization and modern society has led to the advancement of new technologies. Information and communication technology have become an integral part of our daily lives. Technology has infiltrated every aspect of human life. Children are growing up in a world surrounded by screens of televisions, computers, and mobile phones, spending less and less time playing and interacting with other children. Children now spend increasing amounts of time on the internet, social media, and video games, leading to discussions about a new disorder - screen dependency. These technologies can negatively impact their psychological and physical health, contributing to increased aggression in young school-aged children. Due to the COVID-19 pandemic, television, computers, and mobile phones have become essential tools for education. This raises the question of whether "screen dependency" is one of the main factors leading to academic underachievement and whether timely intervention can address it. The aim of this thesis was to examine the close relationship between screen dependency and academic underachievement, as well as the extent of this relationship. The study involved students from the lower grades of Josip Pupačić Primary School in Omiš and "1st October 1942" Primary School in Čišla.