California Code, Education Code - EDC § 33440

(a) “English learner” has the same meaning as defined in Section 306.

(b) “Native speaker of English” has the same meaning as defined in Section 306.

(c) “Dual language immersion program” is a program that enrolls both English learners and native speakers of English and provides integrated language learning and academic instruction for native speakers of English and native speakers of another language, with the goals of high academic achievement, first and second language proficiency, and cross-cultural understanding. These programs are also known as two-way bilingual immersion programs.

(d) “Developmental bilingual program for English learners” is a program in which academic instruction and literacy development occurs in both a pupil's home language and in English. It is a program that exists across all grade levels in schools. Academic curriculum is taught through a pupil's home language plus English language development, with increasing academic instruction in English until pupils develop literacy in both languages, at which point academic study in both languages continues.

(e) “Early learning dual language learners programs” refer to language programs in early care and education settings that serve children from birth to five years of age before entry into kindergarten. These programs include, but are not necessarily limited to, preschool, expanded transitional kindergarten, and transitional kindergarten, where the goal is to support development of both languages and to promote bilingualism and biliteracy.

(f) “Dual language learners” (DLLs) is the term used in early education to refer to children from birth to age five who are learning two or more languages at the same time, or who are learning a second language, such as English, while continuing to develop their home language.