Worked examples are an effective instructional means to teach complex problem-solving skills. It has been argued that worked examples decrease extraneous load, enabling more Working Memory (WM) resources to be directed to activities that facilitate learning and transfer performance. Hence, cognitive load research has started to shift its focus towards finding instructional techniques that impose a germane cognitive load by stimulating the allocation of WM resources to such activities. This special issue provides an overview of recent experimental research on ways to further optimise the design and delivery of worked examples in order to foster learning and transfer.