The DLM Early Childhood Express is a holistic, child-centered program that nurtures each child by offering focused, meaningful instruction that is developmentally appropriate. The complete system provides a wealth of English and Spanish materials to help foster the social-emotional, intellectual, and physical development of children. Children learn best by connecting what they know with what they learn. Essential Questions in units connect children to new ideas and understanding. Concept Books are a collection of non-fiction selections that introduce the essential questions for each unit and help children make their connections between their background knowledge and unit themes.