The studies related to the effectiveness of teaching delivery are considered very important in science. Nowadays, the professors have an option to replace the traditional learning with virtual platforms where they can place all their materials. A main aim of this paper is to show effectiveness of teaching during a period of the COVID-19 pandemic, especially for the logical subjects such as mathematics. A percentage of the students who passed the mathematics courses at the SSST University in Sarajevo was taken as an indicator for effectively conducted teaching. Considering our analysis of a situation at the SSST, we showed that the difference between a pass rate of Computer Science students at exams before or after theCovid-19 pandemic and a pass rate during the pandemic was statistically significant.



