During the COVID-19 pandemic, it was necessary to convert teaching to a distance method. The distance form of education had the advantage of student´s choice of place and time for study. However, students had to study using self-access. This could have a negative impact on study results. On the other hand, they could retain their academic results due to the extension of the time needed to grasp the subject matter. This article deals with the analysis of the performance of students regarding the study grades and the time required to complete a single assignment in the course of Mechanical Testing and Defectoscopy of Materials.