Date of Publication


Document Type

Master's Thesis

Degree Name

Master of Science in Teaching Major in Biology

Subject Categories



Br. Andrew Gonzalez FSC College of Education


Science Education

Thesis Advisor

Maricar S. Prudente

Defense Panel Chair

Voltaire M. Mistades

Defense Panel Member

Socorro E. Aguja
Mary Jane C. Flores


The shift to online distance learning due to the pandemic presented a challenge to develop learning materials that could compensate for the limitations of the learning modality. Micro-lectures are short instructor-made videos that meant to deliver lessons in ways that do not overwhelm the learners’ working memory in processing information. This action research, using a Quasi-experimental mixed method approach, implemented the use of micro-lectures in teaching photosynthesis to an intact group of sixty grade-12-STEM students to see its effect on their concepts and confidence levels in answering the concept tests. The instruments used were pre-test and post-test with confidence ratings and survey forms. The results showed that watching micro-lectures had a positive effect on students’ test performance resulting to medium gain based on Hake’s classification. There was also significant difference between pre-test and post-test scores based on paired t-test. Confidence increased for majority of the participants in pre-test vs post-test with significant difference as implied by the results of Wilcoxon Signed- Rank test. In investigating the relationship between confidence ratings and test score, the use of Spearman’s rank order showed that there was no correlation between pre-test scores and its confidence ratings, while there was weak correlation between post-test scores and its confidence ratings. This was further analyzed by determining the bias scores in the post-test which revealed overconfidence and underconfidence among students. The data from survey, journal entries, and FGD indicated that students view micro-lectures as an effective learning material that declutter the lessons for better understanding and its segmentation encouraged a more fragmented and flexible way of learning. Moreover, the researcher’s account of the development of micro-lectures proved that there are no limitations to making and sharing instructional videos since the common multimedia devices are sufficient, and the constraint to its wide adoption is familiarization.

Abstract Format






Physical Description

vii, 154 leaves


Instructional films; Biology--Study and teaching; Photosynthesis; Distance education

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