The use of evidence is a growing theme in educational discourse. One type of review of the scientific literature that is strongly associated with it is the meta-analysis. Meta-analysis combines results from a variety of research studies on the same topic into a single study in order to identify a central trend expressed as an effect size. However, meta-analysis is dependent on the quality and quantity of the research that is selected.
Ever since March 2020, the Covid-19 pandemic has forced schools to replace in-person teaching with remote means of learning. These unprecedented circumstances are, for the evangelists of technology, ideal for the complete transformation of the regular teaching system, favouring the concept of the virtual school and the development of 21st century competences, the rising personalisation of student learning paths and truly differentiated education.