Unwanted Sounds/(讨厌的声音) -> #2of3 Intermediate/(中级) -> Discovering Music All Around Us/(音乐就在我们身边) -> Learn/(学习)

Unwanted Sounds/(讨厌的声音) -> Discovering Music All Around Us/(音乐就在我们身边) -> #2of3 Intermediate/(中级) -> #[Tier 6] Pedagogical Aspects for Children/([第六]教育层为儿童) -> Users Group/(用户群)

Unwanted Sounds/(讨厌的声音) -> Practise/(实践) -> Step 2 High School/(第二步高中) -> Years Group/(年级群)