Our Story

A Parent Participation School

We are a non-profit parent cooperative preschool in Antioch, CA.

We were founded in 1955 by a group of doctors in East County. We’ve been operating from the same building at the Contra Costa County Fairgrounds since that time. We have approximately 48 member families and are run by an all volunteer board of directors under the guidance of a paid teacher/director.

We are licensed by the State of California and are members of the California Council of Parent Participation Nursery Schools (CCPPNS).

So Big operates on a traditional school year and is closed during the summer. Please join us for Summer Park Days; dates, time and location are listed on the right.

We are dedicated to using a developmentally appropriate curriculum and providing a warm and nurturing environment. The preschool program is mornings only and parents are involved both in the classroom and with all administrative functions of the school. Our adult to student ratio is 1:4.

Please look around the website and use the Contact Us page or simply call 925-757-6474 if you have questions or would like enrollment information!


Mission Statement

So Big Co-op Preschool is dedicated to providing a warm and nurturing environment that helps each child develop emotionally, socially, intellectually and physically at his or her own pace. Our program is play-based and encourages each child to question, to wonder and to explore the environment in order to foster a lifelong love of learning. By involving parents at every level, families gain a sense of community, parent-to-parent support and the basis for future involvement in their child’s education.