Due to the Covid-19 pandemic, blended teaching has been the norm in the
past two years. This has brought about online workshops characterized by
collaborative learning, action-reflection and on line interaction. Through an
exploratory data research performed via an on-line questionnaire, this article
investigates the students' perception of two on-line laboratories. The
collected data highlights pros and cons of a teaching mode meant to encourage
virtual learning and a collaborative construction of knowledge.