Effect of AI-Based Chatbot Tutoring on Student Engagement and Retention in Biology Courses in Selected Federal Colleges of Education in North-East Nigeria. AFRICAN JOURNAL OF AI FOR DEVELOPMENT, [S. l.], v. 1, n. 1, 2026. Disponível em: https://afjad.org/journal/article/view/65.. Acesso em: 23 oct. 2026.