Canadian research relevant to French immersion program development in Ontario is reviewed and summarized. The review includes studies on six program or instructional aspects: (1) attitudes and motivation of immersion students and parents; (2) achievement of immersion students in English language arts and other subjects; (3) French proficiency and factors in immersion instruction; (4) cultural knowledge and foreign language use in immersion students; (5) prediction of success and procedures for transfer in and out of immersion programs; and (6) pedagogical and administrative issues. The review is organized in question-and-answer format, and an executive summary is similarly designed. Annotated bibliographies of recent, comprehensive, and readily available literature on each aspect are appended. (MSE)