Employers expect college graduates to be critical thinkers. However, the impact of college curricula on critical thinking skills is debated. Furthermore, individuals with low critical thinking ability may have difficulty improving it, since they may lack the metacognition skills needed to accurately assess weaknesses in their thought processes. A case study of the effectiveness of a critical thinking course for business majors and instructional techniques designed to help students improve their thinking is reported here. The effect of the course and course design was measured using the quality of case reports, the Business Critical Thinking Skills Test, and students' self-perception of critical thinking skills. Students significantly improved their critical thinking and some were able to more realistically assess their critical thinking ability, demonstrating the potential of the course and its design to improve critical thinking and metacognition skills.