Mustika Wati et al. 2023. Integrating Authentic Learning in Collaborative Problem-Solving Model: Stacking Analysis of Students’ Problem-Solving Abilities Running Head: Authentic Learning in Collaborative Problem-Solving Model Type of the Research: Research Article. Kurdish Studies. 11, 2 (Dec. 2023), 5165–5181. DOI:https://doi.org/10.67145/ks.v11i2.1116.