This book is about exploring and presenting a model of digital-based curriculum for Christian education suitable for the digital ways of learning, communicating, and thinking. Park discusses the limitations of analog-based curricula, most of current curricula, and necessities for digital-oriented ones. Then, he provides a new model of curriculum--curriculum as software. Curriculum as software is a curricular framework for embracing digital culture like open-flat network, service-centered management, interactive communication, and offline-online hybrid learning space. It consists of four spiral stages: analysis, design, simulation, and service. In the process of designing units, 4R Movement--a new learning theory--is utilized to encourage today's young people to construct their own knowledge after critically analyzing various resources of information. 4R-embeded courses are implemented in the four movements: reflection, reinterpretation, re-formation, and re-creation.