dear Hitesh,
It all depends primarily on the topics and audience.
As you mentioned Managers, and if they are new managers force and you like to train them on how coping up and managing well as new leaders. Try a written down 5 minutes questionnaire with objective type and 2-4 Line
answers , subjective ones, not more than 2-3, covering some real time client escalation, time management issues, work delegation
& team skills and also on pro active and reactive approaches, see how they think at pre-session and how their thought process changes on post session. -Sandeep Bakshi