Saying "Any questions?" does not count as being interactive

With few exceptions, people don't learn much in straight lectures and speeches. If you're interested in maximizing learning, make your lesson times interactive. Ask questions (and wait more than 2 seconds!) to give people a chance to interact.

Saying "Any questions?" and plowing ahead one heartbeat later does not count as being interactive.

Give interaction time.

You'll cover less ground, but people will get more out of it. My rule of thumb: don't talk more than ten minutes without creating interaction.