This review describes parts of our research program on example-based learning that relates to recent efforts to incorporate interactive elements into learning environments designed to support learning from worked-out examples. Since most learners spontaneously study or process examples in a very passive or superficial manner, this review focuses on how a variety of specific interactive elements in example-based leaning environments are capable of encouraging learners to actively process the examples. The review begins with an overview of the literature on worked examples and the associated self-explanation, which is important given that the quality of self-explanation is a major factor in determining whether learners benefit from studying examples. The review notes that example-based learning environments tend to be effective but often promote passive processing. It then highlights the strengths and limitations of three types interactivity introduced to example-based learning environments. The review concludes with a discussion of the role that these interactive elements play in these learning environments.