Ajeng Niamul Maula et al. 2026. Real-World Learning Based on SDG 6 to Enhance Students’ Systems Thinking in Nature Schools. Quagga: Jurnal Pendidikan dan Biologi. 18, 2 (Jul. 2026), 127–134. DOI:https://doi.org/10.25134/quagga.v18i2.483.