This thesis explores and describes a specific aspect of the immigration from the former yugoslavian republics in Slovenia. The first section outlines the general characteristics of the immigration from the former republics in contemporary Slovenia. The second part of the study is dedicated to an elementary school in Lubiana, where the majority of pupils comes from the former yugoslavian territories and has a mother tongue different from slovenian. The study, through various data collected by distributing questionnaires to the pupils and their families, describes the languages spoken by them in the private and in the public sphere. Furthermore, it researches how the school, due to the particular origin of its pupils, actively promotes a multilingual and multicultural education and gives particular attention to the teaching of Slovenian as a second language.