Rather than simply balancing strengths and weaknesses on key criteria to reach an overall score for the effectiveness of a piece of writing, analytic scoring calls for teachers to provide feedback on each of the noted criteria for the writing assignment. As a teacher new to this process, you might need to read the paper or at least parts of the paper more than once to be able to assess and rate each of the criteria. More experienced teachers report that they can assess multiple criteria after a single reading of the paper.
Start by reading several papers before you begin using the rubric to assess the papers. Get a feel for the range of responses. Sometimes you may discover that you need to fine-tune your rubric based on a common misunderstanding of the task.
Depending on the kind of assignment, you may interrupt your reading of each paper to respond to a criterion that affects only one part of the paper. (For example, if you are using a rubric to evaluate lab reports, you might have different criteria for different sections of the report.)
Typically, teachers circle key phrases in the appropriate box on the rubric. Especially when teachers leave a column for comments, they will expand on those notations by writing a short response about the criterion evaluation.