Hamidah Sari Batubara, Wahyuni, R.S. and Andriani, A. 2024. The Relationship Between Smartphone Usage and Student Achievement at SMP 21 Pekanbaru. International Journal of Public Health Excellence (IJPHE). 4, 1 (Jul. 2024), 064–069. DOI:https://doi.org/10.55299/ijphe.v4i1.917.