Given the growing importance of digital literacy in children’s education, this article analyzes the role of school mediation in the development of digital competences among Spanish minors. Based on the results obtained from a survey of 2,900 Spanish schoolchildren between the ages of 9 and 17 years conducted at the end of 2018, we explore their attachment to their school, the digital mediation they receive at the center, and their digital competences. The data show that they have a positive feeling of belonging to their school. The most widespread competences among minors are precisely those most related to the playful use of digital devices. Analysis of the association between school mediation and the acquisition of various types of digital skills shows that mediation is effective in the acquisition of most competences among pre-adolescents, confirming the need for early school mediation. There is no doubt that media and digital education contributes to the achievement of more inclusive environments. Educational policies oriented toward safer use of the Internet and a change in the pedagogical paradigm in primary and secondary education should contribute to enhanced development of digital skills during childhood and adolescence.