Finding Resources in your Discipline -- Starting Points for Commenting on Student Writing
Although there are typically dozens of articles in every discipline that consider writing and ways to integrate writing into disciplinary courses, relatively few take up issues of commenting on student work. The citations in these sections include at least some material about evaluating student writing. Despite the disciplinary labels, many of the listed articles give advice pertinent for any teacher integrating writing for any discipline.
In each section I've noted key articles and the full-text database you can use to access any online materials.