Case Studies Approach Students are asked to work in groups to solve real life health and environmental cases. The case studies approach is very common in other allied health classes and brings relevance to the chemistry class. Students also learn to think like diagnosticians to approach and solve a problem Active Learning/Group Work Students work together in groups to solve the case. This collaboration helps train them for their future careers where they will most often work as part of a team to provide patient care. Instructor's Manual An Instructor's Manual is available to accompany the Kelley/Weeks text. The manual provides detailed answers and also gives guidance and advice on how to teach using a case approach.