THE EFFECTS OF SCHOENFELD PROBLEM-SOLVING  INSTRUCTIONAL  STRATEGY ON PERFORMANCE  OF  SENIOR  SECONDARY II  STUDENTS  IN  MATHEMATICS IN GOMBE STATE, NIGERIA. DYNAMIC MULTI-DISCIPLINARY JOURNAL OF NIGERIA, [S. l.], 2025. Disponível em: https://gagdm.com/index.php/DELSULIBRARYNIGERIA/article/view/155. Acesso em: 5 feb. 2026.