The Zagreb School of Economics and Management (ZSEM) has systematically used e-learning in teachings since its establishment in 2002, which has greatly helped in maintaining the quality of education even during the crisis that was caused by COVID-19. In order to systematically follow the quality of e-learning, ten standards were developed that are divided into four groups: static, dynamic, administrational and other. In this paper, the evaluation results of 134 courses will be analyzed of the undergraduate level of three academic years: 18/19, 19/20 and 20/21 in 4 groups of students - the Economics and Management groups in Croatian and English, the Business Mathematics and Economics group and Elective courses group. Regardless of the difference in the quality of the developed courses, all groups behave similarly and have an increase of 13-17% in regards to quality standards during the COVID-19 pandemic. The static and administrative standards have unsignificant changes, while the dynamic and other standards have a significant rise. The analysis of individual standards shows that the usage of certain elements has highly increased. This example of good practice shows how, with good preparation and continuous improvement, it is possible to move from classical to online classes without major problems.