Vocabulary instruction is a critical component of language and literacy lessons, yet few studies have examined the nature and extent of vocabulary activities in early elementary classrooms. We explored vocabulary activities during reading lessons using video observations in a sample of 2nd- and 3rd-grade students (n = 228) and their teachers (n = 38). Teachers spent more time in vocabulary activities than has been previously observed. In the fall, 28% of their literacy block was devoted to vocabulary in 2nd grade and 38% in 3rd grade. Our findings suggest that vocabulary activities were most likely to take place prior to reading a text—teachers rarely followed-up initial vocabulary activities after text reading. Analysis of teachers’ discourse moves showed more instructional comments and short-answer questions than other moves; students most frequently engaged in participating talk, such as providing short, simple answers to questions. Students engaged in significantly more talk during vocabulary activities (including generative talk such as initiating an idea) in the spring of 3rd grade than the spring of 2rd grade. These data contribute descriptive information about how teachers engage their students in vocabulary learning during the early elementary years. We discuss implications for practice and future research directions.

This paper introduces a new observation system that is designed to investigate students' and teachers' talk during literacy instruction, Creating Opportunities to Learn from Text (COLT). Using video-recorded observations of 2^nd-3^rd grade literacy instruction (N=51 classrooms, 337 students, 151 observations), we found that nine types of student talk ranged from using non-verbal gestures to generating new ideas. The more a student talked, the greater were his/her reading comprehension (RC) gains. Classmate talk also predicted RC outcomes (total effect size=0.27). We found that 11 types of teacher talk ranged from asking simple questions to encouraging students' thinking and reasoning. Teacher talk predicted student talk but did not predict students' RC gains directly. Findings highlight the importance of each student's discourse during literacy instruction, how classmates' talk contributes to the learning environments that each student experiences, and how this affects RC gains, with implications for improving the effectiveness of literacy instruction.