I agree that it would be a good idea to get some translations in for this general concept. It comes up fairly often in the forum.
However, there may be several different terms in both languages -- for instance,
Tutorium, which basd on past discussions appears to be roughly the same as Übung in this sense.
At my university, we called that a 'discussion section' in the humanities, or a 'lab section' in the sciences. As far as I know, those are fairly generally used, though different colleges could have their own terms.
I had never heard of a 'recitation' in this sense and I'm not sure most AE speakers would understand what was meant by it. Maybe it's a regional thing, but it sounds to me like an archaic term dating back to the era of boarding schools, maybe in the 18th or 19th century.
The person who leads a discussion section, another frequently asked question, is usually a graduate student and in my experience is most often called a teaching assistant (abbr.: TA); that would also be useful to add.