Analysis of the Developed Science Textbook for the fourth grade of primary school in the light of NGSS

The aim of the current study is to reveal the degree of inclusion the developed science textbook for the fourth grade of primary school, edition (2021-2022), the first and second semesters of NGSS .To achieve that goal, A content analysis card, and their validity and stability were verified, and the analytical descriptive approach was used. The results showed the availability of standards: " Disciplinary Core Ideas " average percentage of (45.01%),and "Science and engineering practices" cam average percentage of (43.18%), and " Crosscutting Concepts " a very weak percentage of (11.81%). The results also showed the availability of standards in each of the four domains but in varying proportions. They were, respectively: the field of Physical sciences with a rate of (52.88%), and in the field of Earth and space sciences with a rate of (22.50%),. And in the field of Biology with a rate of (13.64%), and (10.98%) in the field of Engineering design. The study recommended a reconsideration of the extent Crosscutting Concepts and the balance in representing the Disciplinary Core Ideas.