Accommodate studying of the content aims curriculum for the preschool course, in Iran, New Jersey state America Mexico and improvement offers for contents aims progress of the preschool course in Iran.

School is the main road, which enter children to the social, from limit environment family. It is hopeful home for all mothers, and fathers and making the main body for a good and fresh health of lively society. Foundation of knowledge, skills and theories are forming from preschool courses, and the importance and their necessity have accepted by particular and general people. This research has compared and studied the content of preschool curriculum, in Iran, New Jersey and Mexico. Method of investigation is library. Descriptive and analysis. It has been used the tools of books, collection, information, documents and internet, general aims of preschool have studied, due To (guidance of preschool curriculum, research organization, teaching program, program office, and compilation of book school, 2010). On the strength of standard, states of America, in the preschool content field, it has been paid attention to the investigation and explanation of preschool content programs (New Jersey teaching state department and preschool learning 2014). The statute wish has offered by federal you emend, evaluated in the health and training part, in Mexico city. Results showed that, in the content aims preschool, the above country. Has been the same as (recognizing aims, behaviors aims, sentiment aims, and social aims). But preference of the aims. Have been differed needs with respect to acquisitive kind of culture, social necessity and some parts have more arms and leaves. Finally, the advantage and dis advantage of curriculum have considerate in above country, and offered improvements for contentment aims progressive for Iran preschool content.