INTRODUCTION 1 RELATED LITERATURE 11 THE COMPARISON OF STUDENTS’ MATHEMATICS PROBLEM SOLVING ABILITY BETWEEN COOPERATIVE LEARNING MODEL OF TAI AND NHT FOR GRADE VII IN SMP NEGERI 1 PANGKALAN SUSU.

2.1.7.1 Definition Cooperative Learning Model Type Team Assisted Individualization 19 2.1.7.2 Advantages and Disadvantages Cooperative Learning Model Type Team Assisted Individualization 22 2.1.8. Cooperative Learning Model Type Numbered Head Together 23 2.1.8.1 Definition Cooperative Learning Model Type Numbered Head Together 23 2.1.8.2 Advantages and Disadvantages Cooperative Learning Model Type Numbered Head Together 25 2.1.9. Subject Matter 26 2.1.9.1 Use variables to represent quantities in a real-world or mathematical problem, and construct simple equations and inequalities to solve problems by reasoning about the quantities 26 2.1.9.2 Understand that rewriting an expression in different forms in a problem context can shed light on the problem and how the quantities in it are related 27 2.1.9.3 Solving Linear Equation 30 2.1.10. Relevant Research 31 2.2. Conceptual Framework 32 2.3. Hypothesis 34

CHAPTER III RESEARCH METHODOLOGY 35

3.1. Type of Research 35 3.2. Place and Time of Research 35 3.3. Population and Sample 35 3.3.1. Population 35 3.3.2. Sample 36 3.4. Variables and Research Design 36 3.4.1 Research Prosedure 37 3.5. Data Collection Instrument 39 3.5.1 Mathematics Problem Solving Ability Test 39 3.6. Techniques of Analysis Data 43 3.6.1 Problem Solving Ability 43 3.6.2 Data Analysis By Inferential Statistics Technique 43 3.6.2.1 Normality Test 43 3.6.2.2 Homogeneity Test 44 3.6.2.3 Hypotheses Test 45

CHAPTER IV RESULT AND DISCUSSION 47

4.1. The Result of Students’ Mathematics Problem Solving Ability 47 4.1.1 Difference Pretest and Posttest of Class A and Class B 47 4.1.2 Normality Test of Students’ Mathematics Problem Solving Ability 49 4.1.3 Homogeneity Test of Students’ Mathematics Problem Solving Ability 49 4.1.4 Hypotheses Test of Students’ Mathematics Problem Solving Ability 50 4.2. Discussion of Result 51 4.2.1 Mathematics Problem Solving Ability 51 4.2.2 Cooperative Learning Type TAI 51 4.2.3 Cooperative Learning Type NHT 52

CHAPTER V CONCLUSION AND SUGGESTION 53

5.1. Conclusion 53 5.2. Suggestion 53 REFFERENCES 54 APPENDICES 56