This article addresses a current topic for the pandemic context of COVID-19, in which blended learning has become an imperative of today, generating the need for adaptations and developments at the organizational, technical, didactic, ethical, etc. level. Among the aspects involved, an important one is the construction of school learning / educational communities. The article elucidates and models the interactions between members of school educational communities in the conditions of blended learning, highlights the services and online applications useful for ensuring these interactions, briefly reveals the essential aspects needed to build these communities. The results of the research presented in this article served as a basis for the elaboration of the educational policy document "Methodological landmarks on the organization of the educational process in mixed learning in the epidemiological context of COVID-19, for primary, secondary and high school" [7], author the article being the expert-coordinator of the working group.