Never embarrass a student in any way. Instructors are empowered to change the lives of their students. Helping students to identify, clarify, and explore alternative values may be more important than learning facts. Making students remember unconnected facts is irrelevant. Showing them where to find the facts is a skill that will be used for a lifetime.
Teaching is more than data dumping.
Make your non-verbal communication consistent with what you are saying. Get students involved in their learning from their heads to their toes. Students don't care unless they share. When you ask a question, remember to balance the gender and ethnicity of the respondents. Love and respect your students and they will return it.