This paper presents the practical issues involved in introducing e-leaming for the Faculty of Mathematics and Physics (FMF) at the University of Ljubljana, Slovenia. It begins with a short history of e-learning at FMF and is followed by a discussion about the choice of the open source software (Moodle, svn, wiki platform) as the foundation for the web based learning; its advantages and disadvantages. The focus is on materials that enhance classroom learning, conform to learning standards, and at the same time address the needs of the end users - the students. In the end, the results of a survey about the students' attitudes towards e-learning are presented; in general and specific to the e-learning environment at FMF.