The computer Screen can't Substitute the Blackboard

Some teachers take the computer screen as the blackboard. They have input exercise, question, answer and teaching plans into the computer and display them piece, without takong down anything on the blackboard or even the title of a lesson. It is know that teachers are supposed to simulate situations based on teaching and guide the students to communicate in English. Besides, traditional writting on blackboard is concise and teachers can make adjusment and amendment to it if necessary. Furthermore, experienced teachers know well that a perfect courseware is an ideal project in mind, and that in practice, they need to enrich the content on the blackboard with emerging of new questions raised by the students.