When your child moves on to a new piece in the Suzuki book, they may think that they no longer need to play the previous one. Afterall, they’ve mastered it. That’s why they’re allowed to continue, right? On the one hand, yes, only when a student has demonstrated the ability to play the piece with its associated skills will a teacher permit them to advance to the following piece.
However, the reality is a little more nuanced than that. Let me explain. The songs in the Suzuki book have been organized with a lot of thought by the editors. The pieces have been ordered so that with each new song, the student unlocks a new skill. So as the student progresses along their musical journey, they accumulate more skills as well as the understanding of how and when to use them.
As musicians, we always want to play every song to the best of our abilities. When your child first learned Twinkle, they may not have had the level of expression they now have when playing May Song, or Allegro, or even Go Tell Aunt Rhody. Therefore, students revisit previous repertoire not so they can play it the same way as when they first learned it. Rather, by applying all their new skills, your child makes playing old pieces a new musical experience all together!
The great violinist, Hilary Hahn, still plays Twinkle Twinkle Little Star. Watch/Listen to this video to hear how a player with her ability can make it sound: