The Curriculum Open-Access Resources for Economics (CORE) community is creating a new way to teaching economics in a changing world. Textbooks are free online and question-motivated, and are now taught at more than 300 universities. Our introductory text is called The Economy, also available in print. We have also developed a text for non-economics majors called Economy, Society and Public Policy, and Doing Economics, practical projects that use real-world data.