All of the vocabulary found in Duolingo can be found in our List Catalog here: Duolingo.

Duolingo's Chinese curriculum is structured into 6 Parts. Each Part contains several Sections (i.e. Greetings, Numbers, etc.), and each Section contains multiple Lessons. 

If you've studied with Duolingo already, you probably want to assume knowledge of the specific Parts, Sections, or Lessons you've already completed, and then put future lessons into your list queue.