The "big" in the big idea does not mean the big scale and content, but the big core value. It is a deep-seated and transferable core concept, a highly integrated upper concept, and the essential content and way of thinking of the discipline.

Different disciplines have different big concepts, such as "the universe is made up of matter and energy", which is one of the big concepts generally recognized by physics disciplines. According to Professor Wang Qiang's research, the grand view of English can be roughly divided into two aspects: content relevance and language relevance. Theme concept mainly refers to cross-cultural emotional attitudes and values acquired through language learning. Language concept mainly refers to specific language ability acquisition. These two aspects are interdependent and complementary.