Introduction: Academic writing is an essential competence around language and literature, as it allows students to express and argue ideas in a coherent and structured way. However, in seventh grade students, difficulties persist related to textual organization, coherence, argumentation, and the proper use of spelling and grammar. In this context, the pedagogical integration of artificial intelligence tools such as ChatGPT emerges as an innovative alternative to strengthen these processes, if their use is guided, critical, and ethical. Objective: to strengthen academic writing skills in seventh grade students through the implementation of an interactive manual designed in Canva, aimed at the efficient use of prompts in ChatGPT as a didactic strategy. Methodology: The study adopted a mixed approach, descriptive and initiative-taking, with a non-experimental and cross-sectional design. The sample was made up of 35 students and 3 teachers from the Avenir Educational Unit. Likert scale surveys and semi-structured interviews were applied, whose data were statistically analyzed. Results: Significant improvements were evidenced after the intervention: textual organization and academic writing showed increases of more than 70%, argumentative coherence improved by 68% and spelling correction by 65%, in addition to strengthening the responsible use of the tool. Conclusions: The guided implementation of ChatGPT, through structured pedagogical prompts, significantly strengthens academic writing and consolidates itself as a complementary didactic resource that enhances learning without replacing critical thinking or student autonomy. General area of study: Education. Specific area of study: Pedagogy. Type of item: original.