In an age of rapidly changing technology, it’s more important than ever for organizations to effectively support employee learning. Gianpiero Petriglieri, associate professor at INSEAD, has studied leaders who do this well and says they fall into three categories: custodians, challengers, or connectors. He explains which type of learning leader works best in which contexts and how all three approaches can help individuals and teams reach the next level. Petriglieri is author of the HBR article "Three Ways to Lead Learning."