Radio Based Instruction (RBI) is a form of Distance Learning. It is still a superior alternative for those who want more convenience and flexibility for different modalities. One of the most significant advantages of distance education through RBI is that it allows students to use various learning materials while using minimum financial resources. This study aimed to analyze radio-based instruction as a MODULAR DISTANCE LEARNING (MDL) teacher supplementary material in English. Specifically, it sought answers to the following questions: (1) What is the level of radio-based Instruction in terms of objectives, content, learning activities, and assessments (2) What is the teachers? level of perception of RBI in terms of adaptability, appropriateness, consistency, usability, curriculum, alignment (3) What is the status of pupils the Learning Continuity with regards to engagement on academic tasks, cooperation, positive interaction, sense of competence (4) Do the teachers' perceptions on radio-based Instruction have a significant relationship to the learning continuity in English? The descriptive method of research was utilized in this study. The questionnaires were given to45 respondents who are public elementary teachers using radio-based instruction as supplementary study material in English in the District of Pagsanjan and other neighboring towns selected through a simple random sampling technique. The questionnaire was composed of three (3) parts: the level of radio-based instruction, level of perception of teachers, and level of learning continuity. The results showed that radio-based instruction helped the teachers convey the lesson to pupils living in -, far-flung community areas. The findings are impressive. It revealed that respondents who have used Radio-based instruction as supplementary study material in English almost have the same high level of perception of radio-based instruction in terms of objectives, content, learning activities, and assessments. The teachers' perception of radio-based instruction was also positive and almost similar in terms of adaptability, appropriateness, consistency, usability, and curriculum alignment. Therefore, it implies that radio-based instruction has proven to be successful in attaining its purpose to ensure academic growth despite the current pandemic.

RADIO BASED INSTRUCTION: A MODULAR DISTANCE LEARNING TEACHER SUPPLEMENTARY MATERIAL