The purpose of the thesis is to see how Turkish students understand their bilingualism. I have tried to explain bilingualism as a phenomenon and give an insight in national steering documents on the basis of different concepts used by researchers.

The method consists of qualitative interviews with standardized character. Five upper-secondary school students participated and independently discussed the answers.

The result from the interviews is the participators view on bilingualism. The answers were varying. I have got the answer of my question through the interviews and researches. The result is also connected to relevant theories.