Efficiency of blended learning in teaching logic, sets and binary relations

The paper deals with efficiency of blended learning in teaching Logic, Sets and Binary Relations at the Faculty of Education, Trnava University. In the first part the author describes three e-learning courses that are used in combination with classical way of teaching, as well as electronic tests that give an immediate feedback about the level of mastering the courses. In the second part of the paper the author characterises the combination of classical way of teaching and e-learning, analyses the results of the final test and compares the results of students of daily and external form of study.