Chapter Iv Results And Discussions

CHAPTER IV RESULTS AND DISCUSSIONS

The results and findings of the study “Comparative Study on the Effectiveness of Using “Do-It-Yourself” instrument and PowerPoint presentation in Teaching Selected Topics in Chemistry” are presented and interpreted in this chapter.

Table 1.Respondents’ Pretest and Posttest Performance Using PowerPoint Presentation Pretest Posttest Score Interval Performance Level f % f % 76-90 Excellent 61-75 Very satisfactory 21 52.5 46-60 Satisfactory 13 32.5 19 47.5 31-45 Fair 27 67.5 16-30 Poor 1-15 Very poor 60.78 (Very Mean Score 44.10 (fair) Satisfactory) Table 1 shows the performance level and frequency distribution of the respondents subjected to PowerPoint presentation approach in the pretest and posttest. In the pretest, majority (67.5%) of the respondents had performed fairly while 32.5% performed satisfactorily with a mean score of 44.10.This implies that the respondents had little background on the selected topics in Chemistry. In the posttest, more than half of the respondents (52.5%) performed very satisfactorily and satisfactorily (47.5%) with a mean score of 60.78. This implies

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that the respondents have broadened their knowledge after having been subjected to the approach. The respondents improved greatly in their level of performance from fair in the pretest to very satisfactory in the posttest.

Table 2. Respondents’ Pretest and Posttest Performance Using “Do-itYourself” Instrument Pretest Posttest f % f % Score Interval Performance Level 76-90 Excellent 26 65 61-75 Very satisfactory 14 35 46-60 Satisfactory 12 30 31-45 Fair 28 70 16-30 Poor 1-15 Very poor Mean Score 43.62 (fair) 77.47 (excellent) Table 2 shows the performance level and frequency distribution of the performance of the respondents exposed to “Do-It-Yourself” instrument in the pretest and posttest. It shows that most of the respondents performed fairly in the pretest with a mean score of 43.62. This also implies that the respondents have little background on the selected topics in Chemistry. In the posttest, majority of the respondents performed excellently with a mean score of 77.47. This also shows that the respondents have broadened their knowledge after having been exposed to the approach. The level of performance of the respondents greatly improved from fair in the pretest to excellent in the posttest.

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Table 3. Comparison of Pretest and Posttest Means. Group of Respondents PowerPoint Presentation “Do-It-Yourself Instrument”

Mean Pretest 44.10

Posttest 60.78

Mean Difference 16.68

43.62

77.47

33.85

Table 3 shows the comparison of pretest and posttest means between PowerPoint Presentation and “Do-It-Yourself” instrument approach. This shows that there was a great difference between the means of the respondents in the pretest and posttest after having been subjected to the two approaches. The results showed that the “Do-It-Yourself” instrument and the PowerPoint presentation approaches in teaching can both facilitate learning and were found to be effective too. However, respondents exposed to the “Do-ItYourself” instrument got a higher performance level in the posttest compared to those who were exposed to the PowerPoint presentation. This implies that hands-on experience specifically the use of “Do-It-Yourself” instrument is more effective than the PowerPoint presentation, for having caused better learning and understanding on the selected topics in Chemistry. Table 4 shows the comparison between the “Do-It-Yourself” instrument and the PowerPoint presentation approach on the teaching of selected topics in Chemistry in their posttest scores by rank. The posttest mean rank and sum of ranks shows that there was relatively great difference between the scores of the respondents in the posttest. This shows that “Do-It-Yourself” instrument approach had relatively positive effect on the performance of the respondents compared to

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PowerPoint presentation approach. Thus, a highly significant remark rejected the null hypothesis of this study.

Table 4. Comparison between PowerPoint Presentation and “Do-ItYourself” Instrument Approach in their Posttest Scores by Rank. Group of Respondents PowerPoint Presentation “Do-ItYourself” Instrument

Posttest Mean Sum of Ranks Ranks 60.5 20.5

Mean Rank Difference

Sum of Ranks Difference

Remarks

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1600

Highly Significant

2420 820

Ho: There is no significant difference in the performances of the students using “Do-It-Yourself” Instrument and PowerPoint Presentation in Teaching Selected Topics in Chemistry.