The main purpose of this study is to further elicit the use of supplementary materials for least mastered competencies in teaching Biology 10. This specifically aims to answer the level of acceptability of supplementary materials in teaching Biology, students? mean performance in Biology 10, and the significant difference between the students? mean performance in Biology 10 in terms of pre-test and post-test. The present study used the descriptive quantitative research method in gathering information. The scope of this study is centered only on measuring the acceptability of supplementary materials for least mastered competencies in teaching Biology 10. The data and information were gathered by using a survey questionnaire composed of 35 questions that are answered by the 130 grade 10 students from Sta. Catalina Integrated National High School as respondents of this study. The researcher also conducted a pre-test and post-test before and after the use of supplementary materials. Moreover, the primary data-gathered instrument used was a questionnaire with a 5-point Likert Scale with ratings of (5) Strongly agree, (4) Agree, (3) Moderately agree, (2) Disagree, and (1) Strongly disagree. Weighted Mean and Standard Deviation were used to determine the level of acceptability of supplementary materials in teaching Biology 10. In addition, paired t-test will be used to determine the significant difference in the students? mean performance in Biology 10. The overall results of the study revealed that the supplementary material for Biology 10 is very high. Specifically, the content, design adaptability, suitability, and usability, having an overall mean of 4.32, 4.34, 4.29, and 4.40 and 4.32 respectively, indicates that it received positive feedback from the students and can be effectively used for teaching Biology 10. Similarly, the students? mean performance in Biology 10 in terms of Pre-test was very satisfactory with a mean score of 31.47 and a standard deviation of 2.18. As for the Post-test, the students performed on an outstanding level, with a mean score of 34.17 and a standard deviation of 2.72. Findings show that from the very satisfactory it became outstanding, meaning that students learned from the lesson using the supplementary materials. Furthermore, there is an observed significant difference between the tests. This is evidenced by the computed t statistic which is -8.843, which implied that the post-test scores were higher than the pre-test scores due to the negative result. Additionally, the computed t-statistic is beyond the critical t-value of 1.979 and the computed p-value is less than the significance alpha of 0.05, hence the significance of the test. Based on the data gathered in this study, the researcher arrived at the conclusion that the null hypothesis stating that ?There is no significant difference on the students? performance in Biology 10 in terms of pre-test and post-test? is rejected which calls for the acceptance of the alternative hypothesis.

Least Mastered Competencies

Supplementary Material

Teaching Biology