This article reviews the topical and methodological trends in the past 85 years of research on language classrooms in The Modern Language Journal. The primary focus is on empirical investigations into oral classroom instruction in post-secondary classes, which include comparisons of language teaching methodology, observational procedures in classrooms, examinations of teacher and learner talk, and some reports on the influence of specific factors such as tasks and learner attitudes on instructional interaction. Since the review is limited to studies published in the MLJ, a critical comparison of findings is not feasible, although some general trends are noted. The article documents a substantial broadening of scope and sophistication of the methodology adopted for research on instruction in language classrooms. Some critical improvements in methodology are suggested.