This study intends to demonstrate how well a problem-solving curriculum develops critical thinking abilities. After randomly splitting the participants into two equal groups (control and experimental), the study was conducted on a sample of learners of the Optimal Investment Program in the Department of Curricula and Teaching Methods. The primary research instrument was a test of critical thinking. The findings demonstrated that the problem-solving program had an impact on the experimental group's growth in critical thinking abilities in a favorable and statistically significant manner. This effect was mediated by the underlying factors of identifying and controlling variables, testing hypotheses, and reasoning.