Young English-language learners who are still developing oral and literacy skills in their home languages benefit most in early childhood programs that regularly expose them to both languages. Many existing dual-language programs for young learners are currently found in Head Start and Early Head Start, which established standards that require its providers to address the needs of dual-language learners and “principles” that direct Head Start programs to develop children’s first languages, as well as English. Having good language skills in a home language would be a strong support key for having success in a second language. Preschool DLLs are still in the process of learning their first language. They don’t yet know enough in either their home language or in English to form a robust foundation for their future learning, so they need access to what they have learned in both.