The sequence of physical and mental development is represented by the process of individual life development from low-level to high-level, from simple to complex, and from quantitative change to qualitative change. This order occurs naturally and cannot be changed. External forces can only affect the speed of development, but cannot change the sequence of development.

Educational Enlightenment: Following the sequence of human physical and mental development, education must be gradual, spiral, and gradually improved. The sequential nature of human physical and mental development determines that education cannot go beyond the corresponding development stages. On the basis of following the sequence of human physical and mental development, education can maximize human development and improve human development level.

Human life is usually divided into infancy, early childhood, childhood, adolescence, youth, middle age, old age, etc. Each period represents a different stage of physical and mental development. Stages are the age characteristics of physical and mental development, and are the typical, general, and essential characteristics of an individual at a certain stage of physical and mental development. It is not unique to a certain person at this stage, but is a universal and overall characteristic that is common to people at this stage. It reflects the typical, general, and essential characteristics of people at this age stage and is different from other age stages. Characteristics. At different stages of physical and mental development, individuals develop at different speeds and focuses, and face different conflicts and development tasks.

Educational inspiration: The staged nature of human physical and mental development requires that education must formulate different educational goals, select different educational content, adopt different educational methods, and provide education in line with the age characteristics of that stage based on the different characteristics of physical and mental development at each stage. educate. Education should not be "implemented without restraint", treating primary school students as middle school students and children as adults. Because their physical and mental development stages are different, their mental development levels and cognitive understanding of things are also different.

The difference in physical and mental development means that each individual is a unique living body, and its physical and mental development is unique, which constitutes the difference in physical and mental development between people. The differences in human physical and mental development include both group-level differences and individual-level differences. At the group level, children with different cultural backgrounds, different classes, and different genders have differences in their physical and mental development. At the individual level, difference is its fundamental characteristic. The differences between people come from both physiological inheritance and acquired influence and education. Even twins will show certain differences in interests, hobbies, and personality development due to differences in acquired living environment and education.

Educational inspiration: According to the differences in people's physical and mental development, education should be suitable for each person's personality and specialties, teach students in accordance with their aptitude, learn from others' mistakes, and maximize the development of each person. The differences in physical and mental development, against treating people as abstract persons, and the implementation of uniform education. The difference in physical and mental development means that everyone is a unique individual. Education must be suitable for everyone's development and create personalized education suitable for everyone, "making people become themselves, 'become themselves'"

It refers to the imbalance in the speed of physical and mental development, sometimes fast and sometimes slow. The imbalance of physical and mental development is reflected in many aspects. First, in terms of overall physical and mental development, the development process is not uniform, with peak periods appearing at different stages; second, in different aspects of physical and mental development, the speed of development is uneven. Some develop faster in the early stages and slower in the later stages; thirdly, the development speed of the same aspect of body and mind is uneven at different ages.

Educational inspiration: Educators must seize the sensitive period of physical and mental development. The sensitive period of physical and mental development refers to the period when the body and mind are more sensitive to certain stimuli and when certain aspects of their functions and abilities are most suitable for formation. During this specific period, human development is very sensitive to certain stimuli. With appropriate stimulation, it is easier for the body and mind to develop. After the sensitive period, although these developments can still be obtained, it is relatively difficult. Education should pay attention to the sensitive period of physical and mental development and teach in a timely manner.

Although human physical and mental development can be divided into two aspects: body and mind, and the body and mind can be divided into more elements, these elements form an organic unity. When one of the elements is missing or imperfect, the other elements will be affected. Elements can play complementary roles to form a complementary whole. First, the complementarity of physical functions and psychology. Second, the complementarity of physical and mental development is also reflected in the fact that the loss of a certain body function can be compensated by the extraordinary development of other functions.

Educational inspiration: Using the principle of complementarity of physical and mental development to inspire students' morale and cultivate students' self-confidence and strong will is an important part of education.