The researchers used the descriptive analytical method to determine the extent of inclusion of the (NGSS) standards in the science textbook for the ninth grade, and the study instrument was a content analysis card based on a list of (NGSS) standards. They also used many treatments and appropriate statistical methods to achieve the study's objectives. The study's most notable findings included the availability of (NGSS) standards in an acceptable format in a basic ninth-grade science textbook, which were distributed as follows:

The availability of the standards of the basic Disciplinary core ideas was found to be 22 percent, while the standard of science and engineering practices was 43 percent, followed by the standard of Crosscutting Concepts at 34 percent. The study concluded with a set of recommendations, including reviewing some of the (NGSS) standards included in the science book for the ninth grade, which are the standards of Disciplinary core ideas.