Postsecondary cooperative (PSE co-op) education is a structured method of combining classroom-based education with practical work experience, for which Ontario is termed a "hot bed." Adopting a mixed-methods design, this study explores the status and characteristics of Ontario's PSE co-op in the national and the global contexts through the knowledge map analyses. Then, with three case studies at University of Waterloo, Brock University, and University of Victoria, it examines particular aspects of Ontario's PSE co-op concerning some significant questions such as what exactly distinguishes PSE co-op in Ontario, what can be done--especially with new "work-integrated learning" ideas and approaches--to continuously improve this type of experiential education, and how co-op education can be steered to better meet the changing needs in the 21st century.