I have shared my previous book circle discussions for Chapter 1 and 2. Here is my discussion for Chapter 3.
As the book progresses, it gets more specific on suggestions that teachers can implement, or schools as a whole can implement to improve success rates for students.
This chapter was about IQ being fluid, rather than static, which is dramatic if you really think about it. It also talked about other factors that are critical such as self-discipline, and teaching problem-solving skills and social interaction skills.
I went to a PD recently that dove-tailed with this. It was actually on classroom management, but the presenter touched on research by John Hattie, as well. If you have never heard of John Hattie (as I haven't), he is an educational research who did a meta-analysis of thousands of other research studies to look into what practices actually have a positive effect on student achievement.
He found that some of the most important factors are feedback, and student-teacher relationships (rather than many of the other things of which we constantly hear discussion.
If you are interested in more details on his research, look at this link or simply google John Hattie or Visible Learning.