The Mehlville Early Childhood Preschool Program offers an integrated curriculum using a constructivist approach.  This approach allows children to construct knowledge through play and hands-on experiences. Curriculum in seven core content areas is naturally embedded across the school day and the daily schedule. The seven curricular areas are: Personal and Social Development, Language and Literacy, Mathematical Thinking, Scientific Thinking, Social Studies, The Arts and Physical Development.

Mehlville's Early Childhood Preschool Program is an "Inclusive Program." Inclusive classrooms are made up of children with disabilities and children without disabilities. This opportunity enhances the learning skill development of children with disabilities as well as provides invaluable lessons for children without disabilities.