This may sounds confusing, but it's not really.
All language classes involve some kind of feedback whether on-going, spoken, written, etc.
For large classes, I use action comments which are a form of both quantitative and qualitative feedback. After a class, I read these comments and hi-lite interesting parts or comments that deals with class issues. Later, I reproduced these parts, with further comments from me, in a class newsletter. In the next class, students receive the newsletter and in pairs or small groups, take a few minutes to comment on the issues. We are recording our conversations because I think recording is sooooo useful.