At the beginning of this century, the educational industry in the United States had a market capacity of $740 billion to $800 billion, and the total income of profit-making educational institutions exceeded $95 billion. Among them, the preschool education industry accounts for 34 billion US dollars. Nearly 20 years after that, due to the development, the current preschool education industry get the scale which has been equivalent to twice the previous.
At present, the number of employees in the private sector of the entire education industry is estimated to be between 2 million and 3 million.
About 9 million children attend preschool education, with preschool and daycare centers being the main choice, with the highest proportion of children admitted to daycare centers, more than 40%.
As far as types are concerned, there are differences in educational concepts among various institutions, which can be divided into four types. The first one is the "academic type", which is characterized by systematic education, attention to reading and mathematics, and preparation for primary schools. The second, most popular in the United States, advocates that children learn by playing, toys; teachers control the learning environment and assign different tasks; the purpose of which is to develop children's self-discipline and long-term attention. The third one, the key to that is not to emphasize academic but focus on children's creativity and imitation, such as playing different roles in the game; learning content includes gardener work, household chores and many other real life behavior. It is not encouraged to use toys and electronic media, realia are mostly real life appliances, the purpose is to cultivate children's perception and self-awareness. The fourth is called "developmental type", which is also common in the United States. It mainly develops children's abilities in sports, social activity and cognitive field. The class focus on practical activities, and teachers and children handle the classroom as learning environment together.