For us a lecturers, it is important to assess early on in a class whether we effectively reach our students and create the desired teaching outcome. Usually, the major assessment is some kind of exam which takes place at the end of term - and thus at a time when it is generally too late to change anything. Instead, lecturers need a toolset of different feedback and evaluation techniques that provide feedback as required, at different intervals throughout term, adequate for different teaching settings and group sizes, and with a reasonable amount of time and effort required from all parties involved. To help choose a suitable feedback technique for a specific teaching context, we introduce a classification scheme for feedback techniques. On this basis, we rate a variety of well-established feedback techniques, thus making it possible to select those feedback techniques that best suit one's individual needs.