This study investigates the perceptions of 43 English as a Foreign Language (EFL)teachers regarding the benefits and challenges associated with using new textbooks in highschool settings. The research employs a combination of questionnaire surveys and semistructured interviews to explore teachers’ perceptions and experiences. It aims to uncover theanticipated benefits of integrating new textbooks, such as providing updated content,adopting more effective teaching methods, and enhancing student engagement. The studyalso addresses key challenges, including resistance to change, inadequate teacher training,and difficulties in aligning new materials with curricular goals. Additionally, it examines howthese perceptions influence teaching methods and curriculum implementation strategies. Thefindings contribute to a deeper understanding of the role of new textbooks in EFL high schoolenvironments, offering valuable insights for developing language education curricula,instructional approaches, and professional development programs.This study investigates the perceptions of 43 English as a Foreign Language (EFL)teachers regarding the benefits and challenges associated with using new textbooks in highschool settings. The research employs a combination of questionnaire surveys and semistructured interviews to explore teachers’ perceptions and experiences. It aims to uncover theanticipated benefits of integrating new textbooks, such as providing updated content,adopting more effective teaching methods, and enhancing student engagement. The studyalso addresses key challenges, including resistance to change, inadequate teacher training,and difficulties in aligning new materials with curricular goals. Additionally, it examines howthese perceptions influence teaching methods and curriculum implementation strategies. Thefindings contribute to a deeper understanding of the role of new textbooks in EFL high schoolenvironments, offering valuable insights for developing language education curricula,instructional approaches, and professional development programs.