A graduate's ability to be a critical thinker is expected by many employers; therefore development of students' critical-thinking skills in higher education is important. There is also a perception that today's students are technologically "savvy", and appreciate the inclusion of a technological approach to learning. However, the complexity of the concept of critical thinking and the assumptions about students' technological skills are debatable issues that require clarification and evidence-based research in terms of teaching and learning. This paper reports on a case study of an online Blackboard site at the University of Western Sydney, where analysis of patterns of usage of the online site and qualitative analysis of student feedback provide evidence to support its effectiveness for encouraging students' critical thinking. There is potential to expand this into a more widely usable teaching and learning resource in the future, and for further research to explore the benefits for student learning. (Contains 3 figures and 4 tables.)