This document discusses a study that examined the effect of situation-based learning (SBL) on students' mathematical creative problem solving (CPS) ability. The study used an experiment group that received SBL instruction and a control group that received conventional instruction. Results showed that the experiment group had greater gains in mathematical CPS ability compared to the control group. Specifically, the experiment group improved their average score from 16.32 to 32.91, while the control group improved from 16.21 to 24.66. Additionally, the strongest aspect of mathematical CPS ability developed was fact finding, while the weakest was acceptance finding. Therefore, the study concluded that SBL is more effective than conventional learning at enhancing students' mathematical