This training manual and companion videotapes comprise an educational program for professionals and paraprofessionals who work with young children with language disorders. The program is particularly helpful in serving children from linguistic minority backgrounds and their families. The program's strategies are also appropriate for teachers and parents of children in the 2- to 4-year-old range who are developing typically. The "Language Is Key" model draws upon three research bases: early language is critical to later academic success; parents can use simple language facilitation strategies after brief training; and strengthening a child's first language will also support the development of English. Following an introduction, the manual presents brief descriptions of the program's recommendations to train staff in using language strategies with children, to train staff in training parents/families, and to train parents/families. The next section details the program's conceptual framework and the three language facilitation strategies: Comment and wait; Ask questions and wait; and Respond by adding a little more. The final section of the manual answers frequently asked questions about facilitating language with books and with play. Reproducible handouts for each parent or staff training session are appended. The training manual contains 36 references. The two 25-minute companion videotapes, available in Spanish, Korean, Tagalog, Vietnamese, Mandarin, Mandarin with subtitles for speakers of Cantonese, and English with subtitles for people with deafness and hearing impairments, provide specific language building strategies that will enhance typical early childhood classroom routines and parent-child interactions. Presenting videotaped footage of young children and adults, the first videotape shows how parents and teachers can facilitate children's language while looking at picture books; the second focuses on language facilitation during play. (KB)