The Jejueo Education Research Committee has created a guide to Jejueo for educators and students. It addresses a series of important issues, including the question of whether Jejueo should be recognized as an independent language, what makes it different from Korean, where it came from, how it became critically endangered, and whether it can be saved. The guide should be of interest to anyone who is curious about language in Korea. It is also ideal for use in an introductory course in linguistics since it illustrates how research in different branches of language science contributes to an understanding of the history and status of Jejueo.