1. If you consume almost of the lesson time to speak
• Our students’ most satisfaction is to speak much
2. No teaching
• The students want to talk in the lesson and learned at the same time
3. Low level knowledge
• You can never have a good conversation with a narrow global knowledge
4. Question and answer lesson
• Our students do not want to loose their time and money for a meaningless lesson
5. Boring Lesson
• To make our students enjoy throughout the lesson can avoid frustration in learning.
