Development Of Problem-Based Learning–Based Student Worksheets Integrated With Catur Pramana To Improve Elementary School Students’ Science Process Skills. cakrawala-ups [Internet]. 2026 May 20 [cited 2026 May 20];20(1):96-111. Available from: https://cakrawala.upstegal.ac.id/index.php/cakrawala/article/view/582