The areas of development which preschool education covers varies from country to country. However, the following main themes are represented in the majority of systems.
* Personal, social, economical, and emotional development
* Communication, including sign language, talking and listening
* Knowledge and understanding of the world
* Creative and aesthetic development
* Educational software
* Mathematical awareness and development
* Physical development
* Playing
* Self-help skills
* Social skills
Allowing preschool aged children to discover and explore freely within each of these areas of development is the foundation for developmental learning. While the National Association for the Education of Young Children (NAEYC) and the National Association of Child Care Professionals (NACCP) have made tremendous strides in publicizing and promoting the idea of developmentally appropriate practice, there is still much work to be done. It is widely recognized that although many preschool educators are aware of the guidelines for developmentally appropriate practice, putting this practice to work effectively in the classroom is more challenging. The NAEYC published that although 80% of Kindergarten classrooms claim to be developmentally appropriate, only 20% actually are.