It means that in the education of mental retardation, teachers should maximize the coordinated development of physical and psychological functions of children with mental retardation.

Second, the principle of personalized teaching

It means that in the teaching process, according to the characteristics and needs of mentally retarded children, design a basic learning amount for each child that they can reach or master, and then adopt teaching methods suitable for them to promote their development.

Third, the principle of intuitive teaching

It means that in the teaching process, teachers should use various intuitive means to enrich students' images and representations according to their cognitive development level, so that students can master knowledge and form mental skills.

Fourth, fully practice the principle.

Also known as excessive learning, it is the only way to form mental skills and motor skills.