As a teacher, you will come across individuals whom you have to individually stimulate and to whom you must give feedback about their behaviour and learning performance. You should do this from your own subjective viewpoint and describe your own perceptions and emotional reactions. This, and only this, is called feedback. In addition, if you want to initiate a change or need to set limits, then you are exercising criticism. Criticism should not be one-sided and negative, but should show what can be or has to be improved