Today, the use of Information and Communication Technologies (ICT) is part of the daily lives of adolescents. However, its widespread use in all areas, the vulnerable condition of adolescents and the imminent consequences of problematic use are awakening a growing social and educational concern. With the purpose of looking into this problem, the following research aims are formulated: (1) Analyse the perception of adolescents about their academic performance and the interference of ICT in their development; (2) Describe the frequency of use of ICT and its influence on study time and grades; and (3) Analyse the relationship between family supervision of ICT and academic performance. The representative sample consisted of 1101 adolescents from 10 educational centers in the Southeast of Spain. Descriptive statistics, contingency tables, Chi Square, Cramer’s V and Linear Regression were calculated. The results show that more than 50% of the students believe that they would spend more time studying if they did not have continuous access to technologies. Likewise, 20% of the students identify ICT as responsible for the decline in their academic performance. Statistically significant relationships were found between time limitations for Internet access and academic performance. It is therefore concluded that the problematic use of ICT in adolescence is a phenomenon that demands intervention, and the training of parents and adolescents in the responsible use of ICT is urged.