Ratnawulan R. Increasing The Competence of Science Teachers in The Batusangkar City through Technical Guidance on 21st Century Learning Implementation in Integrated Science student worksheet. pelita [Internet]. 31Mar.2022 [cited 10May2024];5(1):28-6. Available from: http://pelitaeksakta.ppj.unp.ac.id/index.php/pelitaeksakta/article/view/169