[The New Yonsei Korean Series] consists of six levels, each with textbooks for vocabulary and grammar, speaking and writing, listening, and reading.
The vocabulary and grammar textbooks are designed to help Korean language learners understand and utilize the most essential vocabulary and grammar for each proficiency level, while the speaking and writing textbooks are designed to focus on speaking and writing tasks to help students perform the expressive skills essential for smooth Korean communication.
Additionally, the listening and reading textbooks are designed to foster comprehension skills appropriate to each level of proficiency, focusing on reading and listening tasks.

These three textbooks can be used together as a package to promote balanced development of vocabulary, grammar, expression, and comprehension skills, or they can be used separately depending on educational conditions or learner needs.
Additionally, separate guides for vocabulary and grammar textbooks will be provided, providing a valuable guide for Korean language teachers, both domestically and internationally, who may lack teaching experience. The [New Yonsei Korean Series] will be a valuable resource for many teachers and all learners working on Korean language education, both domestically and internationally.