This descriptive-comparative study assessed the effectiveness of interdisciplinary teacher teams among English teachers in public secondary schools in Jolo during school year 2023-2024. One hundred (n=100) samples were taken through non-probability sampling method, quota sampling, among selected public secondary schools in Jolo, Sulu, Philippines. A modified questionnaire was used to elicit the perceptions of English teachers regarding the effectiveness of implementing interdisciplinary teacher teams in public secondary schools. English teachers believed that the interdisciplinary teacher teams among secondary schools was very effective in Instructional Practices, Student Orientation, Team Organization, and Team Structures. Findings also noted significant difference on the perceptions of English teachers regarding the effectiveness of interdisciplinary teacher teams in Team Organization. The study highlighted the positive impact of interdisciplinary approaches on student engagement and achievement. Interdisciplinary teacher teams offered opportunities for professional growth and development. Educators had the opportunity to expand their knowledge base, develop their teaching practices, and gain insights into alternative instructional approaches through collaboration with colleagues from different disciplines. Educational institutions can support this professional development by providing resources, incentives, and recognition for interdisciplinary collaboration.