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ix CHAPTER 1: INTRODUCTION 1 Statement of the Problem 4 The Comprehensive School Improvement Plan 4 Iowa Tests of Educational Development 5 Need for the Study 8 Purpose of the Study 9 Research Questions 10 Assumptions of the Study 12 Limitations of the Study 12 Definition of Terms 12 CHAPTER 2: LITERATURE REVIEW 15 Historical Background 15 Modular scheduling 16 Middle school concept 19 Eight-period day 20 Call for restructuring 21 Block Scheduling 22 Benefits of block scheduling 25 Construct!vist classrooms 28 Disadvantages of block scheduling 32 Elements needed for implementing a block schedule 35 Standardized testing 37 Related research involving standardized testing 40 AZB versus 4x4 block 45 Lack of convincing evidence 45 Summary 47 CHAPTER 3: METHODOLOGY 50 Introduction 50 Research Design 50 Human Subjects Release 51

The effects of scheduling modes on high school student achievement in Iowa