Four Basic Types of DDMs 1.Pretest and Posttest 2.Repeated Measures (e.g., DRA2 or running records, Lexia Core5 or Strategies for Older Students) 3.Holistic Evaluation (e.g., portfolio) 4.Posttest only (e.g., end of unit, term, or course assessments; capstone project) Note: A DDM should show growth over a year.
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