The technologies and online supports that can offer students study opportunities have increased a lot in recent years, but often students do not use computers or mobile devices in school and, in general, for educational purposes. The Action of the University of Turin, within the "Ragazzi Connessi" project, proposes strategies for school recovery in Mathematics which involve the introduction of an online service built around an integrated Moodle platform with an advanced computing environment, an automatic assessment system and a web conference service, which enable the use of innovative didactics methodologies. The project involved teachers and students from three different secondary schools in the city of Genoa. This paper shows the main aspects of the platform and the strategies for school recovery developed inside the Action, in particular mathematics recovery path for students, carried out entirely online. [For the full proceedings, see ED621620.]