The scientific community is facing one of its greatest challenges to solve a global health problem such as the COVID-19 pandemic. This situation has generated an unprecedented volume of publications. The impact of COVID-19 on teaching has meant that moments of social contact have disappeared in exchange for meetings, classes, exams or virtual meetings. In this scenario, the university virtual classrooms when reopened will not be the same. The aim of the study was to identify the scientific publications on the teaching-learning process in university virtual classrooms during the period from 2019 to mid-2020, that is, from its beginnings until June 2020. For this, a bibliometric analysis of the scientific literature was performed. The number of publications in the period of the pandemic in the most diverse disciplines is reported, as well as the interaction between research clusters. The COVID-19 pandemic has revealed the serious deficiencies of our educational system, due to the poor theoretical-methodological preparation of teachers, and, in addition, it has revealed the fallacy that the constructivist model is the only way to educate our students.