Considering reviewers' opinions on the paper, presented at EPDE2021, in which the data were not sufficient to compare different cohorts, now we are able to answer if there have been differences in students' assessments, based on some questions of the academic survey on didactics, comparing answers for courses held pre-and-during Covid19 pandemic. In 2020 every educational institution moved their didactics toward an online platform. Every course had to introduce and experiment with new forms of didactics that prevent in-person events, either in lectures or laboratory. Courses of design traditionally require a strict relation between student-instructor and student-student. The need to operate by moving the contact to an online connection creates, at the beginning of the period, a lot of distrust among teachers of such courses. The "Machine Drawing" course is one of these. Briefly recalling how the courses have been revised, with the employment of a communication platform like Teams®, the answers, given by students, are collected and the differences along the time are highlighted. Three academic years have been considered