Hi! We are a family of four and we are moving in Vienna on summer. Our children are 9 and 13 years old. They don't speak German. They are both great pupils with highest marks. What can we expect for them when they will start going to school in Vienna? We would like them to go in public schools and to become fluent in German? Is it possible for our older son to go in Gymnasium after two years in Mittelschule? Thnx in advance