Of duty with the aim of the right and social justice of the pensioners, including the 20 at the beginning of the year, is a 40 increase compared to 1401. Found according to announcement Educational Research and Planning Organization, 1700,000 students failed to register their textbooks, the head of the Educational Research and Planning Organization said that due to the failure to enter the information of some students in the integrated student system, or sida, these students have difficulty registering their order. He said that all types of online purchase of textbooks for this category of students will be implemented with the preregistration of the School Administrators until the problem of the sida system is solved. The online sale of textbooks started 6 months ago. Students must be registered in the sida system. We have said the reason what is the student, what kind of student are you, which lesson of the book should we send, but the sida system is not the answer for all schools, th