During the 2018-2019 school year, Fort Worth Independent School District implemented LENA Grow in four early learning classrooms to help ensure the district’s youngest students were receiving high-quality language development support. The district serves 86,000 students in Fort Worth, Texas. Classrooms that used LENA Grow, an experiential professional development program for early childhood teachers, increased scores in key CLASS® domains compared to classrooms that did not use the program, a pre-post evaluation shows. LENA Grow uses strengths-based coaching and regular feedback from LENA technology to help teachers increase classroom quality by boosting back and forth interactions with children. Teachers who participated in the program increased the amount of Conceptual Development, Quality Feedback and Language Modeling in their classrooms as measured by CLASS®, an evaluation tool that assesses classroom quality. (author abstract)