The client...the student in other words...has to accept the training his company has requested. FSI adhears to a rigid code of standards so your answer should be I would train him per the curriculam (oops splling?) and request he voice his concerns via critique. As to the lectures. KISS. Make them discussions not lectures. They want to know you can communicate. Involve them all in questions. Look them in the eye. Move away from the podium but dont pace. Take all change out of your pockets.(So you don't nervously jingle it!!) Finally if anyone in the room starts talking or disrupting, it's probably a challenge to see if you can firmly take charge and keep the discussion on track.