The main goal of this study was to ascertain the effectiveness of an intervention programme on narrative coherence in students with Typical Development (TD) and with a Developmental Language Disorder (DLD). Participants were 99 five-year-old students from schools in Tenerife. A task involving retelling a story was used for the narrative analysis, in which we studied thematic unity and the causal and temporal semantic relationships. The intervention programme, which had a total of 55 20-minute sessions, was organized into different practice levels and enlisted the collaboration of teachers and speech therapists. Two experimental groups (DLD and TD) and two control groups (DLD and TD) were established. The results show that students with DLD initially showed worse performance on coherence than their classmates with TD. After the programme, the students who received the intervention not only improved their performance but showed the strongest gains in thematic unity and mental state-causal relationships. The working model used serves as a guide for early intervention. [Translation from Spanish by Mary Black.]