This study examines interactions between teachers and students during reading comprehension instruction to determine how certain patterns of teacher-student talk support student comprehension achievement and reading engagement. The central focus of the study is "conceptual press discourse," a pattern of teacher response that includes requests for evidence, examples, clarification, and elaboration. Hierarchical Linear Modeling analysis of data from 21 fourth- and fifth-grade classrooms (495 students) indicated that in classrooms where teachers more frequently used discourse patterns that reduced conceptual press, students demonstrated weaker comprehension and engagement outcomes. (Contains 8 tables, 1 figure and 2 notes.)