The report consists of four case studies which show the extent and importance of the problem of education of migrant workers and their families as seen by Finland, France, Sweden, and Yugoslavia. Dealing mainly with the education of second generation Finnish workers in Sweden, the first study addresses the teaching of the mother tongue and the host language in the context of the migrant family's socio-cultural situation. Trends in the socio-educational situation of migrants in France are discussed in the second study; some activities selected, either because they have been undertaken on a large scale or because of their experimental character and the results' qualitative value are analyzed. Topic of the third study is the different arrangements for teaching the immigrants' mother tongue in the Swedish schools. The last study discusses the socio-educational position of migrant workers in receiving countries, and what Yugoslavia is doing, both at home and abroad, to train its migrant workers. A final report of a 1976 international seminar on migrant education held in Geneva covers the main points discussed, conclusions, and recommendations adopted regarding specific difficulties encountered by migrant minorities in host countries; the analysis of the role of host countries and countries of origin in meeting the needs of migrant communities; the current research on teaching of the mother tongue and host language to migrant children; and the bases on which established school and socio-educational policies might be re-examined. (SB/NQ)