The number may vary from 2 to 20 trainees/students. Our surveys show that the ideal number would be between 7 and 15 attendees.
However, this also depends on the preparedness and mobility of the trainer, and the training format. For instance, contrary to classroom courses, for the Virtual/Remote training session, we suggest the number is between 5 and 10, to preserve the attention of the trainees as well as not lose the effectiveness of the training.