1. Children of different ages have different degrees of physical and mental development. In early childhood, children's physical and mental development is in the primary stage, and their cognitive ability, language ability and motor ability develop rapidly. Therefore, the focus of education at this stage is mainly on the cultivation of basic life skills, such as basic self-care ability, good living habits, initial learning ability and social skills.

2. Children of different ages have different learning abilities and learning styles. In childhood, children's cognitive ability gradually developed from concrete thinking in images to abstract logical thinking, and began to understand and master some complex concepts and laws. Therefore, the focus of education began to shift to the study of subject knowledge, including Chinese, mathematics, science and other basic knowledge.

3. Children of different ages face different tasks and challenges. During adolescence, children begin to face important exams such as senior high school entrance examination and college entrance examination, and need to master more subject knowledge and skills. At the same time, they are faced with more choices and decisions, and need to learn to think independently and make decisions independently. Therefore, the focus of education has changed again, turning to cultivating students' independent thinking ability, critical thinking and innovative spirit.

The basis for the change of educational priorities at different ages is as follows:

1. In early childhood (3-6 years old), the focus of education is mainly on the cultivation of basic life skills, such as basic self-care ability, good living habits, initial learning ability and social skills. Children at this stage are in a critical period of physical and mental development. They need to establish self-awareness through constant practice and experience, form independent personality and cultivate interest in learning and exploration.

Therefore, educators should create rich and diverse environments, guide children to observe, explore, practice and experience, encourage children to find and solve problems, and provide psychological support and comfort for children with good teacher-child relationship.

2. In childhood (6- 12 years old), the focus of education began to shift to the study of subject knowledge, including basic knowledge such as Chinese, mathematics and science. At this stage, children have acquired the initial ability of abstract thinking and self-restraint, and can better understand and master concepts and laws. Therefore, educators should attach importance to the teaching of basic knowledge and the cultivation of skills.

In addition, educators should also pay attention to children's personality development, respect children's hobbies, encourage children to conduct in-depth exploration and practice in their fields of interest, and cultivate children's innovative spirit and practical ability.

3. In adolescence (12- 18 years old), the focus of education has changed again. At this stage, the focus of education has shifted to cultivating students' independent thinking ability, critical thinking and innovative spirit. Teenagers have mature abstract thinking ability and self-restraint ability, and can think and learn more deeply. Therefore, educators should give them more autonomy and choice, encourage them to study and explore independently, and cultivate their innovative spirit and practical ability.