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The purpose of this study was to examine the ways in which teachers use language to promote vocabulary development (i.e., vocabulary talk moves) during science instruction in early-elementary classrooms. Twenty-four total science lessons were recorded by eight teachers, providing 894.27 min of observational data across three timepoints. Discourse analysis was used to identify specific research-aligned vocabulary talk moves. Findings revealed that the cohort of teachers used considerably more moves for building students’ knowledge of word meanings than for building students’ awareness of words and word learning or for interesting students in words and word learning. Likewise, the cohort used more authoritative moves (teacher telling) than dialogic moves (inviting student exploration and engagement). This study contributes to the field's understanding of the ways that science instruction supports literacy learning and literacy instruction supports science learning in the early-elementary grades. The findings from this study have implications for teacher professional development and policy.

Background knowledge and oral language have long been linked to reading and writing outcomes. Discussions are one way to build both oral language and background knowledge. Nevertheless, designing discussions to support children’s content knowledge and oral language development, as well as build discipline specific speaking practices, can prove challenging. This article describes discussions in one kindergarten classroom during a unit on force and motion. Throughout the unit, children were supported to discuss force and motion in multiple ways and across different types of activities.