Carrying a backpack heavier than ten percent of the student's weight in the long term causes structural problems (Dreier et al. 2014; Chansirinukor et al., 2001) and balance problems in the child (Zahiri et al., 1402) and also causes chronic muscle pain and anxiety. (Macedo et al., 2015). Students are forced to carry all the educational content compiled in the textbooks every day from the beginning of the year. This is despite the fact that many of these materials are related to the second half or the end of the school year. Therefore, the purpose of this research, which is practical in terms of purpose and field-survey in terms of nature; The evaluation of combining elementary school textbooks is to reduce the volume of backpacks with a horizontal education approach. For this purpose, a specialized team was formed with the presence of primary education experts, the director and teachers of Amol City School of Life in the number of 5 people. According to the educational budgeting of the Ministry of Education, primary school textbooks were collected in the form of 7 books titled Mehr book, Aban book, Azar book, Day book, Bahman book, Asfand book and Spring book. The book of the month was divided into 4 weeks. At the beginning of each section, academic, practical and behavioral goals were expected, and a skill-based task and a learning game were also considered according to each goal. Behavioral, health, educational, spiritual and occasion expectations were also included in the book. In the textbook, wherever necessary, a blank page was placed for homework. At the end of each week, a page was considered for student evaluation, where the teacher described the process of achieving the goals set for the week in relation to the student. A page for parents' survey was also considered. With the implementation of this plan, the student only had to bring one book to school during the month; In this way, the weight of the student's backpack decreased from about seven kilograms to about one kilogram. This project has been implemented since 2016 for 4 years in the non-governmental school of Amol Life ( 2400 students) and it is continuously used based on the opinions of teachers, students and their parents as well as experts in improving the plan. became. The results showed that according to the teachers, with this method, the class is managed more regularly and teaching becomes easier. Making students' backpacks lighter would ensure their health and parents' satisfaction on a large scale. Also, parents stated that in the past they had to pay a lot for books and many offices, but with the implementation of the consolidation plan, their expenses have been greatly reduced.