“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 (April 24, 2025). Accessed February 5, 2026. https://gagdm.com/index.php/DELSULIBRARYNIGERIA/article/view/155.