Guidelines are offered for teachers with pupils whose native language is other than English. They are presented in the form of eight principles and related classroom practices, derived from current thinking and research on second language learning and culturally sensitive instruction. The principles are: (1) bilingualism is an asset and should be fostered; (2) there is an ebb and flow to children's bilingualism, and it is rare for the languages to be perfectly balanced; (3) there are different cultural patterns in language use; (4) for some bilingual children, code-switching is a normal language phenomenon; (5) children learn second languages in many different ways; (6) language is used to communicate meaning; (7) language flourishes best in a language-rich environment; and (8) children should be encouraged to experiment with language. (Contains 15 references and lists of reports and videos available from the National Center for Research on Cultural Diversity and Second Language Learning.) (MSE)