In an era of catastrophic climate change, businesses that are sustainable will be more likely to survive and thrive. The same is true of business schools. This article discusses different business school approaches to this transformation, touching on both successes and ongoing challenges. While its focus is on Berkeley Haas, it also draws on a 2022 benchmarking survey of other business schools. Mainstreaming sustainability education into the business school curriculum is not without its challenges, yet considerable progress has been made.