Cognitive biases restrict and even prevent the acceptance of new information, but the introduction of critical thinking may help control bias. The subject is a case study of how educators with adult students use critical thinking to control cognitive bias. The topic of cognitive bias is well researched, with over 150 different types of bias identified and insights into how instructors' biases might affect student success in the literature review. Hopefully, this addition to the field will reveal how we design curriculum, invite students to join, and share our knowledge about how we know what we know. The recognition and understanding of why we think the way we do is perhaps the first step to acquiring knowledge and program success.