This study aimed to design and validate the SOLO-Based Learning Activity Sheet (LAS) and utilize it to determine its effects on the performance of learners in Science. The SOLO-Based Learning Activity Sheet (LAS) served as the instructional material which contains different activities representing each SOLO level as to ‘unistructural, multistructural, relational, and extended abstract’. It used a descriptive developmental research design participated by 185 Grade 10 learners. Using the ‘mean score’ and ‘standard deviation’, the results revealed that the expert validation of SOLO-based learning activity sheet (LAS) was highly acceptable in terms of “components and characteristics”. The learners were subjected to pretest and posttest to measure any significant changes in performance before and after implementing the SOLO-Based Learning Activity Sheet (LAS). Using a ‘paired T-test’, the results show a significant difference between the pretest and posttest. It shows that the performance of learners has improved after the utilization of the SOLO-Based Learning Activity Sheet (LAS).
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