The experimental program described in this report provided English-speaking Canadian children with elementary schooling exclusively in French for kindergarten and grade 1, and then from grade 2 through grade 5 mainly in French except for two half-hour periods of English language arts. The guiding principle for this form of bilingual education (referred to as a home-school language switch) is that priority for early bilingual schooling should be given to the language or languages least likely to be otherwise developed or most likely to be neglected. Several questions concerning results observed thus far are considered in the report, involving evaluation of the children's language development, cognitive development, and attitudes. (VM)