A bit off-topic, at least it's part of the Telekolleg series.
I'm running out of ELT series. Currently, I like watching educational series on ARD alpha. Next to languages (English, French, Latin), maths (and vintage series chemistry) is also very interesting. Currently broadcasted on Tuesdays, the 2009 Grundkurs Mathematik (15 episodes, pre-course for Telekolleg), hosted by Heinz Gascha. Pictured is episode "Quadratische Gleichungen". Not available on the daserste-alpha mediathek but on the BR mediathek (in HD) and on YouTube. Handsome boys, but these probably only in this episode.
There is also a Grundkurs Englisch, but I have to check that, also mentioned in Telekolleg.
Daily at 7-7.30 there are 2 episodes "Ich mach's" (vocational job profiles). Some episodes are also interesting (for older teens). Sundays 2 episodes of German course Anna, Schmidt & Oskar (co-editor Lothar Humburg).
Currently aired
Telekolleg Englisch (Wednesdays)
GRIPS English (for teens) Wednesdays
Playtime (for kids) Saturdays
Fast Track English (Business) Tuesdays
Englisch für Anfänger (see Auffrischungskurs Englisch)