Create an atmosphere that encourages student participation by using a conversational tone and not criticizing student questions or comments in front of the class. Consider moving closer to the students rather than speaking from behind the podium. Explain your reasons for varying the traditional lecture style. Students more willingly participate in class if they understand the rationale behind an approach that may be unfamiliar. If you want students to talk, look at them.
Some teachers call on students.
Asking students to speak in class is easier to do if they use name cards or if you have learned their names. Some students will be too shy to speak in a large group, at least at first. Invite challenges to your ideas. This can lead to lively debates and shows that students are thinking and engaging with the material. Also, invite questions.