Good practice uses active learning techniques. Students who arrive in the classroom, open the tops of their skulls, and passively wait for knowledge to be poured in will surely be disappointed. To belabor the metaphor almost beyond reason, most of it will spill right out. Our job, then, is to create environments in which students can work, and work hard, at learning. In planning a class session, I think it is much more important to think about what my students will be doing during the session than what I will be doing.
Good practice gives prompt feedback.
One of the most valuable resources we have to offer our students is our expert judgment of the quality of their work. We can help students learn by focusing their efforts on the knowledge and skills they have not yet mastered, while reinforcing their accomplishments. The more prompt and specific we can be with our feedback, the more opportunities our students have to focus their efforts appropriately. In addition to being prompt and specific, responses are most useful when students can actively use the feedback in some way. If they encounter an offensive object, they will try to bury it.