Problems with grammar or usage are not significant enough to garble meaning. Punctuation is usually correct. Paragraphing is attempted. Paragraphing is lacking or irregular. Errors in grammar or usage are very recognizable.
Spelling errors are numerous.
The organization strengthens the central idea. The order, structure of presentation of the information is compelling and moves the reader through the text. Details seem to fit where they are placed. Sequencing is logical and effective. The organizational structure is sturdy enough to move the reader through the text without severe confusion.