Problem-based learning (PBL) is a powerful instructional approach. By working through assessable complex problem-solving tasks learners can be encouraged to actively engage in investigation and inquiry and to use high level cognitive thought processes to solve real-life problems in professional contexts. A critical element of a successful PBL design is the inclusion of instructional support, such as scaffolding, to guide and assist the learner through the reasoning process that is crucial to successful problem-solving. The e-learning tool "Challenge FRAP" (Form for the Recording of the Analysis of Problems) is client-based public domain authoring software which facilitates the use of scaffolding, the provision of progressive feedback and can promote student reflection at key decision-making points. This paper illustrates the benefits of such an e-learning scaffolding tool through two PBL case studies; one group-based PBL task in science and technology and one self-directed PBL task in plant pathology. (Contains 4 figures and 4 tables.)