I am not sure if she is scratching like that because she is a kitten or not. I have had two (adult) fosters who do the same thing, so it may just be a habit that needs to change.

One thing I have found very helpful is, if she responds to catnip, get the catnip spray (from PetSmart or other pet store) and spray that onto the scratching posts. If she has a "favorite" spot to scratch on the floor, spray some of the "cat off" on to a rag and leave it on that spot. This combination of positive and negative re-inforcement, seems to have worked for most of my guys.

Good luck