Okay so let's see if we can get this nailed down:

Level 1 - Description. Level 1 is to bring out the descriptive talents of the writer. Spelling, grammar, and other such should be left for level two. Any additions?

Level 2 - Spelling and grammar, and writing structure such as paragraphs and lead ins and such. Any additions?

Level 3 - Round table discussions of writing and.....I don't know yet.

Level 4- No idea.