what are the qualities of a good socialstudies? HOW ARE The textbook used by the teacher?

Opinions vary. And it depends on the course, and the age of the students, and the IQ level of the students (AP, regular, or less).
My own use of texts has a history tending to not use the darn things. They are so full of pablum and fluff they have little value. My use tends to use texts as student resources, mostly supplemental to class work. My students were for the most part gifted kids.
If I were a Middle School teacher, with average kids, I probably would use the text more....my perception is that those kids do not have greatly developed listening and attention skills, and need structure in learning.
So it varies, there can be no single rule on this.
I taught Math and Science to bright teens.
Other teachers familiar with the social studies areas will have differing opinions. Remember the nature of the students and the availability of other resources have a big impact on teaching style and use of texts.

When it comes to the qualities of a good social studies textbook, there is no definitive answer as opinions may vary. However, here are some common qualities that are often sought after:

1. Accuracy and reliability: A good social studies textbook should provide accurate and reliable information based on well-researched facts.

2. Clarity and organization: It should present information in a clear and organized manner, making it easy for students to understand and navigate the content.

3. Engaging and relevant content: The textbook should be able to engage students by providing interesting and relevant examples, case studies, and real-life applications of the concepts being taught.

4. Diversity and inclusivity: It is important for a social studies textbook to reflect diverse perspectives and experiences, including those of marginalized groups. This helps students develop a broader understanding of the world and fosters empathy and global citizenship.

5. Critical thinking and analysis: A good social studies textbook should encourage critical thinking skills by presenting different viewpoints and encouraging students to analyze, question, and evaluate the information being presented.

Now, regarding how a textbook is used by a teacher, it can vary depending on various factors. Some teachers may utilize textbooks as the primary resource for teaching, covering the content chapter by chapter. This approach often works well when the textbook aligns closely with the curriculum standards and objectives. However, other teachers may view textbooks as supplemental resources and incorporate a variety of additional materials, such as primary sources, articles, videos, and hands-on activities.

Regardless of how a teacher chooses to use a textbook, it is important to remember that textbooks should not be the sole source of learning. It is often beneficial to supplement textbook readings with discussions, research projects, interactive activities, and real-world applications to deepen students' understanding and engagement with the subject matter. Ultimately, the decision on how to use a textbook should be based on the needs of the students, the curriculum requirements, and the teacher's own pedagogical approach.