1. What is the critical period of children? 2. Classification of critical periods of children 1. Critical period of physiological development 2. Critical period of physical function development 3. Critical period of psychological development 3. The importance of critical period of children 4. How to use the critical period of children to promote children Development 1. What is the critical period of children? The critical period of children refers to a state in which a child\’s perception and learning ability of certain things will rapidly improve within a specific age group. At this time