This study is intended to design efficient method for Korean Grammar Education using the Corpus of Spoken Korean in the 7th curriculum. In this curriculum two subjects - `Language and Korean - Knowing Korean` and `Trimming Korean` - are proposed. The former deals with fundamentals in `Knowing Korean` while the latter deals with the category of attitude. Also, in the 7th curriculum a distinctive, student-oriented learning method, called `Inquiry Session,` is suggested. The `Trimming Korean` aims to foster desirable attitudes in Korean language life, and the `Inquiry Session` and the `Trimming Korean` are related in cognitive perspective and emotional perspective, respectively. The Corpus of Spoken Korean has two merits. First, it helps the Korean language education be free from the knowledge of Korean language tilted toward written language. And students can accept it naturally since they use it in daily life and thus can detect any change easily. In this study the system and morphology of vocabularies are discussed by comparing the Corpus of Spoken Korean with that of Written Korean in the top 50 most-frequently-used words. At the same time, a teaching and learning program is worked out on the word formation of the words used in spoken Korean during the inquiry session in the `Knowing Korean` and ways to use spoken language materials for the `Trimming Korean` are discussed.