Abstrak
Textbooks play an crucial role in the learning and teaching process of English. Therefore, it is essential for textbooks to align with the current curriculum and effectively achieve the learning objectives. This research aimed to investigate and analyze the content of the “Bahasa Inggris” textbook for tenth grade of senior high school. A qualitative approach using the content analysis method was employed. The unit of analysis was the level of cognitive ability according to Bloom's Revised Taxonomy (BRT). Data were collected from an English textbook published by Kemendikbudristek. The study result indicated that the textbook contained a total of 211 activities from all chapters distributed across various of cognitive levels: 67 activities at level C1, 52 activities at level C2, 22 activities at level C3, 16 activities at level C4, 9 activities at level C5 and 45 activities at level C6. This distribution revealed an imbalance in the cognitive level activities within the textbook. Consequently, this study highlighted the need to diversify the activities and tasks in each chapter to better achieve the maximum learning objectives for students.