A student's grades communicate his/her relative mastery of content. Educators gather achievement information to make instructional decisions (formative assessment) and to communicate summative performance in a course or on a task (summative assessment).
Link to Grading and Progress Monitoring Region 20 Resource from the PGC Network
http://programs.esc20.net/default.aspx?name=pgc.grading
*Pages 12-16 Authority for Decision Making, Progress Monitoring, Grading Responsibilities and Grading Flowchart for Teachers