Gegen die Wand, released in 2004, is a film that deals with cultural expectations, addictions, and other (bad) coping devices. In other words, right away one I wouldn’t recommend for the classroom, though it might be an interesting one in the aspect of cultural expectations in a university setting.
The lead male role is played by Birol Ünel, who was born in the area of Turkey that the character was also to be from. He crosses into Turkish, German, French, and American films, including Enemy at the Gates, Soul Kitchen, and im Juli.
The female lead is played by Sibel Kekilli, who was born in Germany and of Turkish descent. This is known as her debut role, though it appears she did some adult films before this. Very shortly after Gegen die Wand, she was in Kebab Connection, another famous Turkish-German culture film, though interestingly she played an Italian in it. Perhaps most famously, Kekilli played Shae in Game of Thrones.
The brother is played by Cem Akin, who was also in Im Juli, Soul Kitchen, and Kebab Connection (are we sensing a theme here?? Yes, many others in the credited cast were also in these films…)
Gegen die Wand is rated R in the U.S. The reasons why are detailed in IMDB‘s parental advisory page. Beyond the cultural clips (which do then also touch on generational issues and the gender stereotypes that go with them), there is nothing more educational to be learned from this film, and as such, I wouldn’t recommend its use in most educational settings.