In this brief article, I am going to describe the phenomenon of bilingualism and its advantages for children and their global development, in order to support the necessity of a bilingual and bi-cultural education of children at an early age. I hope that the general ideas expressed here will help ESL teachers to find an intercultural orientation in their own teaching practice in class and to develop a better understanding of foreign cultures. In order to connect theory and practical teaching, I will also try to give some general ideas concerning TESL and intercultural teaching.
In the first chapter, I will strive to define the general concept of bilingualism, which is unclear in many cases, as it has many contradictory definitions, which depend too much on the unilateral views of certain linguists and researchers. Without a clear definition of bilingualism on a theoretical level, it is impossible to produce scientific results to apply in every-day ESL teaching practice in a multicultural classroom.