California Code, Education Code - EDC § 8974

(a) Establish connections with public preschool programs, including state preschool, state child development, and federal Head Start programs, to establish a more effective transition of children from preschool to kindergarten.

(b) Promote connections among early primary programs that provide before- and after-school services.

(c) Promote joint activities for teachers and administrators of public preschool programs, including state preschool, state child development, and federal Head Start, and kindergarten and grades 1 to 3, inclusive, in areas such as program planning and staff development training related to developmentally appropriate curriculum and assessment practices for young children.