The document discusses metalinguistic awareness, which refers to an educated language user's implicit and explicit knowledge of a language that allows them to effectively communicate both orally and in writing. It emphasizes that having knowledge is different than applying that knowledge. Learning can occur through both conscious study and subconscious immersion in the language, involving both declarative and procedural knowledge. It then asks if only grammar rules should be taught or if learners should be immersed in the language.