Later, theorists such as Viëtor, Passy, Berlitz, and Jespersen began to talk about what a new kind of foreign language instruction needed, shedding light on what the grammar–translation was missing. They supported teaching the language, not about the language, and teaching in the target language, emphasizing speech as well as text. Through grammar–translation, students lacked an active role in the classroom, often correcting their own work and strictly following the textbook.