In order to make the classroom feel more at ease, create an environment of good communication. Ask questions but don't direct them to any individual student. This takes the pressures off of them. Let the students answer the questions on their own without being volunteered. Let the students ask questions as well. This will also create an environment which lets the conversation flow and generates different ideas and viewpoints on the topic being discussed. Make the lesson less about your reading to them, and more about the conversation and input the students have on this topic.