19 13 Montessori was invited to give a lecture in the United States for the first time and set up a teacher training class, which was welcomed by the White House. According to the characteristics of infants' mental development, Montessori teacher training course is specially designed for infants aged 2-6 who have the characteristics of absorbing information from rich environment.

It involves five aspects: daily life practice, sensory education, mathematics and language and culture education.

Montessori's educational philosophy;

Montessori's educational thought can be simply described as that children have a mental embryo, or that children have a psychological development model before they are born. If a mental embryo wants to develop according to its planned model, it must have two harmonious and unified conditions-environment and freedom.

On the basis of direct observation and in-depth study of children, Montessori gradually formed his own unique educational philosophy-Montessori's philosophy of children's education. Montessori inherited the views of Rousseau, Festorozzi and Froebel on natural education and free education to a great extent.

They all attach great importance to children's innate potential and advocate that children should fully develop their potential in an environment full of love and freedom.