Anggriyani, M. et al. 2025. Optimizing Student Motivation and Learning Outcomes Through Group Investigation Cooperative Learning Model on Ratio Material: A Study of Mathematical Reasoning Ability. Indonesian Journal on Learning and Advanced Education (IJOLAE). 7, 3 (Sep. 2025), 537–552. DOI:https://doi.org/10.23917/ijolae.v7i3.8743.