The “Word Gap” has come to symbolize the gulf that can separate very young children who have rich opportunities for positive early learning experiences from those who do not. Science reveals that early language and literacy skills are important predictors of later success in school—and that as a group, children in families of lower socioeconomic means have fewer skills and know far fewer words than their more privileged peers. ZERO TO THREE has compiled as set of resources, in English and Spanish, to will help families, professionals, and policymakers understand the importance of supporting early language and literacy and how best to do so.