Abstract : Radio-Based Instruction (RBI) emerged as an effective supplementary tool to support learning during the pandemic and in the transition back to face-to-face classes. This study aimed to determine the performance of Grade IV pupils in English subjected to Full Radio-Based Instruction, Mixed Radio-Based Instruction and Normal Teaching, and Normal Teaching, and to identify the instructional factors contributing to the implementation of Radio-Based Instruction. This study employed a quantitative approach using two designs: quasi-experimental and descriptive. The data was gathered from 107 Grade IV pupils and 28 teachers of the DepEd Naga City Division. The results showed that the pupils’ performance was below expectations and there were significant differences in the level of performance of the students in all three modes of instruction. The teachers rated the objective as the most important factor for successful RBI, while they did not place high emphasis on learning activities and student engagement. This study highlights the potential of RBI as a supplementary educational tool, providing valuable insights into the instructional factors contributing to the successful implementation of RBI. The proposed intervention plan seeks to enhance RBI to improve learning outcomes and offers opportunities for more inclusive and accessible education.

Keyword : English, Implementation, Level of Performance, Naga City Division, Radio-Based Instruction.