Preparing lecture formats and lecture notes are important and making notes can be a good idea about observations. Delivering the lecture is a special form of communication in voice, gesture, movement, facial expressions and eye contact. It can serve to reinforce the content being delivered in the classroom. Teaching and demonstrating will deliver content, which will keep students engaged and interested in the course. Also, it is important to deliver lectures because it will enable students to learn materials and demonstrate and enjoy the process.