This study focused on the teaching-learning materials and methods used by the teachers at the Higher Secondary Level in Bangladesh. This study tried to find out the types of methods and materials used by the teachers, how they used these, and how these catered to the diverse needs of the learners. This research followed a quali-quantitative method using questionnaire surveys and semi-structured interviews. A total of 530 students, 28 teachers, 10 teacher-interviewees, and 5 key informants participated in this study. The findings revealed that the materials and methods employed in teaching English at the Higher Secondary Certificate (HSC) level do not align with the curriculum objectives. Moreover, the teachers follow a medley of methods and materials that neither significantly match the latest teaching-learning approaches nor serve the purpose of making the students proficient in English. It was also found that most teachers have no training in language teaching methods, materials, and pedagogy. So, this study felt the necessity for arranging teacher training, redesigning materials, and creating interactive teaching-learning environments to ensure learners’ more comprehensive grasp of English language proficiency in real contexts.