The LENA Grow program incorporates classroom-level LENA data with a coaching curriculum to promote language nutrition for early educators. Through LENA Grow, teachers complete a 10-week curriculum, where they receive LENA data from their classrooms, discuss strategies to increase their language nutrition, and develop goals to increase the quantity and quality of language used with children in their classrooms. LENA summarizes the overall amount of talking within the classroom environment (Total Words), as well as the amount of interaction with individual students (Conversational Turns). To date, LENA Grow has been used in over 2,000 center-based classrooms, serving more than 18,000 children. However, the efficacy has not been well studied. The goal of this project was to test the impact of LENA Grow teachers serving at-risk children and compare the outcomes to teachers receiving business-as-usual coaching. We achieved this goal by addressing the following research questions: 1) Do teachers who completed LENA Grow substantially increase the quantity and quality of the language used in their classrooms? 2) Do teachers who completed LENA Grow rate themselves as being more effective teachers when compared to teachers completing business-as-usual coaching? 3) Do children whose teachers completed LENA Grow experience substantially greater academic and language gains when compared to children whose teachers completed business-as-usual coaching? (author abstract)