Julia, R., Sudianto, S., Nahdi, D. S., & Cahyaningsih, U. (2025). Reconceptualising Mathematical Problem Solving and Higher-Order Thinking: A Comparative Analysis of Lesson Study-Based Instruction and Conventional Teaching . International Journal of Educational Innovation and Research, 4(2), 280–288. https://doi.org/10.31949/ijeir.v4i2.15179