BIRMINGHAM, Ala. — When Rickeyda Carter started teaching young children, she led story time the way she remembers being taught as a child. That meant children were expected to sit, listen — and remain silent. “When the teacher is reading, you don’t talk,” Carter recalled.

Carter didn’t think anything of this approach for nearly a decade, until the program where she was employed, New Rising Star Early Childhood Development Center, opted to participate in an initiative aimed at improving the interactions between teachers and children in their care. For 10 weeks, the 3- and 4-year-olds in Carter’s classroom donned miniature vests with “talk pedometers” nestled inside, meant to track how often children and their teachers converse. Carter received weekly coaching and data on how much, when and with whom she was talking in her classroom. As she learned about the science behind why those conversations are so important, Carter realized she wanted to change things.