When it comes to measurement, four is a popular number; rather, a range of 1 to 4 is a common scheme. Two different powerful measurement systems use a range of 1 through 4 scores to clarify levels of quality. The Depth of Knowledge [DOK] framework by Webb, 2005, uses a 1 through 4 scale to rank the cognitive complexity of an assessment task. The Proficiency Scale framework by Marzano and Kendall (2008) uses a 1 through 4 scale to rank students’ performance levels on individual standards. Read more
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