This is a research on the effectiveness of textbook organization, advance organizer, and instructional objectives on the level of comprehension, study speed, and student's attitude to text. The subjects were 112 students (62 female, 50 male) who were selected through multi-stage cluster sampling from the Humanities colleges of Tehran public universities; each subject was randomly assigned to one of the experimental groups. The research tools include: 1) various texts, 2) comprehension test, 3) a questionnaire on the student's attitude to text. Moreover, the study speed has been calculated and Multivariate Analysis of Variance was applied for data analysis. The findings showed that organized- rather than non-organized texts significantly increased the level of comprehension in students. Moreover, inclusion of instructional objectives and advance organizer in texts that were developed according to organizational criteria increased the level of comprehension in students; but in those texts that lack organizational criteria, the inclusion of these variables cannot offset the negative effect of the text's organizational defect on student learning. As such, applying organizational criteria to the main text, with or without advance organizer and instructional objectives, significantly increased study speed of students, but made no significant difference on the student's attitude to text in any experimental group. Based on the research findings, our main suggestion is that to develop more comprehensible textbooks, the best way is to use organized textbook patterns.