The Relationship Between Intensity of Instagram Social Media Use and The Learning Environment with Student Concentration in Grade XI at SMA Negeri 9 Manado. HEB [Internet]. 2025 Dec. 30 [cited 2026 Mar. 22];1(2):86-94. Available from: https://ejurnal.jurkeppolkesdo.my.id/index.php/HEB/article/view/73