RATNANINGRUM DS. PENINGKATAN PRESTASI BELAJAR MATEMATIKA MATERI PROGRAM LINIER MELALUI PENERAPAN METODE PROBLEM SOLVING BERBANTUAN MICROSOFT TEAMS DIMASA PANDEMI COVID-19. J.t [Internet]. 2023May12 [cited 2025Jan.11];3(1):31-9. Available from: https://jurnalp4i.com/index.php/teaching/article/view/2162