Puspitasari R. Implementation of Project-Based Learning in Renewable Energy Materials: Analysis of Implementation and Its Impact on Students’ 21st Century Skills. Scientica Education Journal [Internet]. 2025 Nov. 28 [cited 2026 Mar. 26];2(5):30-8. Available from: https://jurnal-ilcaagam.com/index.php/SEJ/article/view/319