Exploring Scriptural Sources is an innovative, ecumenical textbook enabling students to explore key aspects of the early Christianity using primary texts. The interactive aspect of the case study methodology (problem-based learning) is engaging even for bored college students and enables persons with no background in textual criticism to learn it rudiments effortlessly. This textbook is a natural choice for introductory New Testament courses. The author has prepared a teacher's manual and interactive software versions of his Case Studies that can be accessed at www.didache.info.