Developmental psychologists have found that children can benefit from involvement in some form of before they enroll in formal schooling, which takes place at age 5 or 6 in the u. s.

Developmental psychologists have found that children can benefit from involvement in some form of  Educational activity before they enroll in formal schooling, which takes place at age 5 or 6 in the u.s..
This became a reason why pre-schools are really popular in United States, because it provides a platform for the kids to learn how to socialize and learn with other kids before they enter the schools

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.