Measurement and evaluation of environmental components in the experimental science textbooks of the first secondary level based on Shannon's entropy with a special attitude to the STSE approach

The best age to develop love and interest and a sense of responsibility towards environmental issues is primary and secondary school. The purpose of this study is to investigate the position of environmental components science books. The research method is the analysis of data based on Shannon's descriptive entropy index. The studied society is all the science books. The results show that the highest frequency of attention to the components of environmental education is related to the 9th book (67) and the lowest is related to the 8th book (46). The components of animals in the 9th and 8th books, soil and stone in the 8th science book, the energy and food component in the 7th and 9th books, and the water and seas component in the 7th science book have the most attention and abundance. The highest coefficient of importance of Shannon in three books of the first secondary level, respectively, related to the components of animals and fauna (0.211), renewable and non-renewable resources (0.161), plants, forests and trees (0.153) and Biosphere is (0.116).  The components of growth and population and protection and maintenance have the lowest Shannon importance coefficient, and important issues such as air and energy have not been given significant attention. The results show that the curriculum of sciences has been able to provide students with lessons in some environmental subjects that fit the needs of students and to some extent attention has been paid to the components of environmental education. STSE approach can overcome the shortcomings of the textbook.