I find that when I share course expectations the 1st day of class and reiterate expectations in numerous forms, for example, class announcements and the live sessions, students are less apprehensive about the course. I also like to promote collaboration and critical thinking in class discussions amongst peers. I ask them to share for example their real world experience in regards to a topic, and if no real world experience, what they might do if confronted with the situation. After several contribute their thoughts, I like to say "great discussion between one another here" and praise them for sharing with one another.  I might also ask to expand on the ideas shared to keep the conversation going. Generally I see more students will begin adding to the discussion to share their ideas, or real world information.