Hi Marshall:
Yes, we always want the students to feel we are in control and are directing their actions and learning. Sometimes its a simple job - just asking students questions directly; walking areound the room as your talking; lightly touching the shoulder of a student and asking what do you think?
Other times, we need to be more agressive such as changing activities, moving into a discusion period, etc. The main thing is to get student involved in their learning. They'll retain more and it will be more helpful for them in the workplace.
Regards, Barry