Suzuki has a set repertoire of 7 books. Each song is tailored to teach specific skills. The songs are a means to an end in that they are tools to teach skills. Therefore progress is not judged by the number of songs the student can play, but by the quality of their playing. There is a high focus on technique and tone from the very beginning so that the students can carry their sense of musicality with them as they go.
Learn about performing here.
Learn why repetition is essential here.