This study explores preliminary results from a pedagogical intervention designed to improve instruction for all students, particularly emergent bilinguals in the United States (or English language learners). The study is part of a larger efficacy randomized controlled trial (RCT) of the Instructional Conversation (IC) pedagogy for improving the school achievement of upper elementary grade students. Standardized achievement student data were gathered from (N = 74) randomized teachers' classrooms. Preliminary ordinary least squares analyses of the intervention appear promising for English language arts in general. Limitations in baseline equivalency for students after teacher randomization are discussed along with strategies to overcome them and implications concerned with the education of all students, notably those whose parents speak languages other than English at home.