Yabla's own Cettina takes us through additional questions regarding the law, voting, and the court system in Germany.

The students at the Kepler School can spend their evenings out in West Berlin as well, but are constantly dealing with the boundaries.

Did you know that the traffic lights in East Berlin had a different figure? Not only have they now been adopted in West Berlin, but a new three dimensional "Ampelmännchen" has now been created for the anniversary of Germany's unification.

As rumors began that the border was to be closed, the students began to wonder how their studies and lives would progress.

How did medieval castles in Germany defend themselves? And why were they built the way they were? This video takes us through a castle like those we often see in films.

Smuggling items to relatives who had left Berlin was a difficult mission. At the same time, it often seemed difficult to completely comprehend how high the stakes would be.

In the Middle Ages, people were resourceful when it came to battles. A group of scholars has worked to recreate medieval explosives and weaponry at Coburg Fortress in Upper Franconia.

Outside of the classroom, the students who travelled to the West for school were confronted with important life decisions and their consequences.

Tough decisions had to be made as the future became more and more uncertain. Even the annual class trip required students living in the East to travel separately.

Jenny tells us the long and fascinating history of the town of Speyer and we get a glimpse of the town's landmark, its cathedral.

On the way back from their class trip, the students already have the feeling that their lives will never be the same again.

Cettina takes us through more questions about the structure of German parliament and the roles of various politicians and assemblymen.

As the first incarnation of the Berlin Wall went up, the students and their families scrambled to make quick decisions.

What do you know about the Federal Cabinet of Germany? Cettina takes us through the next set of questions for the German citizenship test.

After the border had officially been closed, the students were separated and often didn't know if their friends on the other side were OK. Luckily, a few letters got through.