National Centre for Case Study Teaching in ScienceThe National Centre for Case Study Teaching in Science is a repository of science case studies for use in classrooms. Include active learning classroom materials such as case studies, discussion questions, games, debates, problem based learning, and role playing activities. All materials are freely available to use, but access to teaching notes and answer keys require a small yearly subscription. (Note: National Centre for Case Study Teaching in Science retains all copyright licensing, and there are some restrictions on use). Provided by the University of Buffalo.