Moving the Needle: What We Know (and Don't) About Developing Leaders examines 34 popular and cutting-edge instructional strategies that educators and trainers have employed to help others develop the capacity to lead. Some strategies have been popular for decades—such as student group projects—while others are just now emerging—such as using generative artificial intelligence. The book is designed to be imminently practical. Each chapter describes a different strategy for development, and includes illustrations of the strategy "in action," examines the state of empirical evidence suggesting what scholars know about the strategy's effectiveness, and provides resources for where readers can learn more. For strategies with a shallower pool of evidence, the chapter provides suggestions for a future research agenda targeted at scholars interested in researching the methods and outcomes related to each strategy.