The types of accommodations that will be needed depend to a large extent on which aspects of the writing process are most problematic.
Accommodations that may be useful include:
Extended time for all written assignments;
Alternate response formats (oral response, video presentation, use of keyboard for in-class writing assignments, etc., depending on the individual's needs);
Use of outlining and/or word prediction software;
Use of voice recogniton software or a scribe;
Reduction in volume of written work required;
Lecture notes or outline provided by instructor in advance;
Recording lectures;
Instructor-provided templates or examples of each type of written assignment required with essential elements noted;
Notetaker (may be as simple as having another student make a carbon copy or photocopy of class notes);