Handika Putra, Roni, Asrial Asrial, and Jefri Marzal. 2021. “Pengembangan Rencana Pelaksanaan Pembelajaran Model Problem Based Learning Daring Untuk Meningkatkan Motivasi Belajar Siswa Materi Perubahan Lingkungan: (Development of Online Problem Based Learning Implementation Plans to Increase Student Motivation on Environmental Change Materials)”. BIODIK 7 (01):84-94. https://doi.org/10.22437/bio.v7i01.11775.