The ACTFL Proficiency Levels and Performance Descriptors provide a very useful tool for seeing exactly what learners are able to communicate and produce at the various proficiency levels. I put together a graphic to visualize the output a bit more concretely.
The question always comes up about how students can move up in their proficiency level. The ACTFL Text Types show the specific types of language that novice, intermediate and advanced learners produce.
Referencing the types of language that learners produce along with the descriptors of what learners are able to communicate we can provide a few suggestion for moving up sub-levels (low-mid-high) and levels (novice, intermediate, advanced).
To move up sub-levels in the novice proficiency range: