Rubrics and checklists provide an effective writing guide for students and a grading tool for the teacher. Most times the students should be provided with a copy of the rubric or checklist before they complete the writing assignment. The rubric or checklist will support students in following the expectations and the grading criteria for the writing assignment. While we want students to use correct punctuation and spelling all the time, there are some writing assignments where the goal is to have the students concentrate on freely writing in to provide a specific amount of content. It is good to consider the goal of the writing assignment and create a rubric that reflects the goal.
The book Solving the Assessment Puzzle by Carolyn Coil and Dodie Merritt provides many examples of rubrics along with good guidelines to creating and and using rubrics.