RESEARCH METHODOLOGY 30 RESULTS AND DISCUSSIONS 42

3.9.1 Normality Test 40 3.9.2 Homogeneity Test 41 3.9.3 Normalized Gain Data 41 3.9.4 Research Hypothesis Test 41

CHAPTER IV RESULTS AND DISCUSSIONS 42

4.1 Description of POGIL Strategy with Worksheet Media 42 on the Teaching of Colloidal System Based on Lesson Study 4.2 Description of School Sample 44 4.3 The Instrument’s Analysis 45 4.3.1 The Observation Sheet of Student’s Interest 45 4.3.2. The Questionnaire of Student’s Interest 45 4.3.3 The Validity of Evaluation Test 45 4.3.4 Reliability of Evaluation Test 46 4.3.5 Difficulty Level Test Result 46 4.3.6 Discrimination Index Test Result 46 4.4 Data of Research Result 47 4.4.1 The Result of Pretest and Posttest 47 4.4.2 The Result of Students’ Interest by Observation Sheet 48 4.4.3 The Result of Students’ Interest by Questionnaire 49 4.5 Data Analysis of Research Result 49 4.5.1 Normality Test 50 4.5.2 The Homogenity Test 50 4.6 Student’s Achievement 51 4.6.1 Student’s Achievement before Teaching Treatment 51 4.6.2 Student’s Achievement after Teaching Treatment 52 4.6.3 The Gain Data 54 4.7 Student’s Interest 54 4.8 Learning Analysis of Lesson Study 56 4.8.1 Lesson Study in SMAN 2 Medan 56 4.8.2 SMAN 3 Medan 58 4.8.3 SMA Swasta Raksana 60 4.9 Hypothesis Testing 62 4.9.1 Hypothesis Test of Hypothesis 1 62 4.9.2 Hypothesis Test of Hypothesis II 62 4.9.3 Hypothesis Test of Hypothesis III 63 4.10 Discussion 64

CHAPTER V CONCLUSIONS AND SUGGESTIONS 66

5.1 Conclusion 66 5.2 Suggestion 66 REFFERENCE 67 LIST OF TABLE Table 2.1 Syntax of Guided Inquiry 16 Table 2.2 Syntax of POGIL 19 Table 2.3 Syntax of Direct Instruction 20 Table 2.4 Differences Real Solution, Colloidal Systems, and Suspension 25 Table 2.5 Types of Colloids 25 Table 3.1 The Description Of Population And Samples 31 Table 3.2 The design of research the implementation of POGIL strategy 32 Table 3.3 Instrument Specification 38 Table 4.1 Description of POGIL Strategy with Worksheet Media Based 43 on Lesson Study in Colloidal System Table 4.2 Description of Class that Used as Sample 34 Table 4.3 Table of Data Pretest and Posttest 47 Table 4.4 Students’ Interest by Observation Sheet 48 Table 4.5 Students’ Interest by Questionnaire 49 Table 4.6 The Data of Normality Test 50 Table 4.7 The Data of Homogenity Test 50 Table 4.8 Data of Students’ Achievement in Pretest 51 Table 4.9 The Gain Data 54 Table 4.10 The Hypothesis I Testing Result 62 Table 4.11 The Hypothesis II Testing Result 62 Table 4.12 The Correlation Between Students’ Achievement 63 and Students’ Interest

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