Theological education is at a global crossroads. Although many traditional programmes struggle to maintain student enrolment, today's environment gives exciting opportunities to serve the global church in ways that are multi-level, accessible, and educationally effective. TEE for the 21st Century utilizes missiological, educational, and sociological perspectives to explore theological education by extension (TEE) as a powerful contemporary tool for equipping the global church for its global mission. Multi-authored by a global team of discipline experts, brought together by the Increase Association, this book speaks to the real-life training needs of today's church. Addressed to leaders, teachers, and practitioners, it offers a robust framework for critically evaluating the impact of TEE on the formation of whole-life disciples in a wide variety of contexts and locations. With a proven track record across Asia, Latin America, and Africa, TEE has a role to play in the future of the church, empowering every member to fulfil their God-given calling to ministry and mission.