"Grading as Teaching," Marie Secor, Dept. of English, Penn State. (Commentaries on the purpose of writing comments on papers, how much or how little to say, local and global comments, positive and negative comments, commenting on substance and on style, etc.)

"Writing for Learning, Not Just for Demonstrating Learning," Peter Elbow. (Includes sections on "Degrees of Response to Writing," and grading. [Also recommended is another article by Peter Elbow, "Ranking, Evaluating, and Linking: Sorting Out Three Forms of Judgment," College English 55:2 (Feb. 1993): 187-206.]

"Helping Students Write Better in All Courses," Barbara Gross Davis, University of California, Berkeley [From Tools for Teaching by Barbara Gross Davis; Jossey-Bass Publishers: San Francisco, 1993]. (Includes a nice section on "Teaching Writing When You're Not an English Teacher.")

"Tips on Teaching Writing," from the Rhetoric and Composition Program at Oberlin. (Ten nice, short tips for approaching writing assignments.)

"Grading as a Teaching Strategy," Derek Soles, National Council of Teachers of English (Very good overview, downloadable in pdf format.)

"Holistic, Analytic, and Theory-Driven Evaluation"

"Evaluating Student Writing: Grading Policies," Department of English, North Carolina State University.

"Evaluating Essays Using Summary or Holistic Grades,", Dept. of English, North Carolina State University. (Scroll up for a nice matrix on writing standards.)

"Grading Concerns," Mary Murray, Cleveland State University. (Issues concerning "overgrading," and "mixing higher and lower order concerns.")