Four essays are presented on the subject of bilingualism, with the specific purpose of providing information for teachers about the ways in which they can help language minority children sustain their first language while acquiring English. After an introduction by G. Richard Tucker, the following papers are presented: (1) "Bilingualism: Its Nature and Significance," by Wallace E. Lambert; (2) "Bilingual Education and First Language Acquisition," by Catherine E. Snow and Beverly A. Goldfield; (3) "Learning English as a Second Language in a Bilingual Setting: A Guide for Parents and Teachers," by Anna Uhl Chamot; and (4) "Cognitive Styles and the Bilingual Educator," by Stephen R. Cahir. (AMH)