The present study was an attempt to evaluate the suitability of English textbook "Vision2" for the Iranian senior high-school students in grade 11 from the teachers' perception. The participants included 45 English teachers (22 males & 23 females) selected based on convenience sampling from various secondary high-schools in Tabriz, Iran. The internal evaluation of the textbook was accomplished through a materials evaluation checklist with 82 items in the form of 5-point Likert scale and the items examined internal aspects (e.g., subject and content, exercises, social and cultural contexts, language skills, vocabulary, grammar, and pronunciation) of the textbook. The results of descriptive statistics revealed that Vision2 matches with some of the students’ needs and with a few changes it can be used as an acceptable textbook for the 11th -grade students. For example, by adding some authentic and interesting sections and exercises for listening and speaking, this textbook can be appropriate for the students and encourage them for further learning. The results can be useful for both the English teachers and curriculum designers. The results point out that textbook writers should perform learner needs analysis before writing new textbooks to make sure they meet learners' needs. Manuscript profile