Abstract: This study tried to evaluate the effectiveness of the “English Book 2” which is taught in Iranian second grade of high schools based on vocabulary and structure criteria. The study was conducted at Chamran, Emam Ali and Dehkhoda high schools in Urmia with 100 second grade high school students in the end of educational year. The checklist proposed by Doaud and Celce- Murcia (1979) was used to conduct the study. After collecting the data, Descriptive Statistics Analysis procedure was applied to analyze the data. The results indicated that the criteria studied in this study had no effectiveness in improving English knowledge of learners. It can be said that the students were not satisfied with their educational source, i.e. English book 2. Therefore, the aimed book needs considerable attention and revision.