During the Training
It is important to give positive feedback to participants throughout the training. However, it may be necessary to give corrective feedback at several points in the training, as you help participants build their skills and knowledge. Effective corrective feedback, which is always given in a supportive manner, helps participants improve. To give effective corrective feedback:
Corrective feedback is never a personal attack on an individual. It is always offered as a way of helping someone increase knowledge or improve skills.