Trauma of any kind is very serious. This can be self-inflicted or inflicted. Both should be treated with extremely good therapists who specialize in trauma informed therapy. EMDR Certification is a key beginning when searching for a therapist and they should have many years of full-time practice as well.
Possibly. Dealing with divorce often destabilizes children. Children take divorce personally and feel at fault. Another common pit to avoid is confiding in your children about how bad your spouse is. To children, their mother or father don’t have faults so to thrust the idea that one of them is terrible, cheater, liar, “unfit to live” causes terrible conflict in children’s foundational core and tears at the fabric of a once safe family unit.
A parent’s approach to helping a rigid child is key to mitigating the problem. Make sure you are solving the right problem. See video: Oppositionality vs. Rigidity
Not necessarily. Some children just need school to come slower and be explained better. If your child is a processing child they may need more help than normal. If your child has ADHD they may just need medication to help them focus. A high sugar and/or high fructose diet may be contributing to the problem. Little or no exercise may also be a large factor.
Providing the support that children need to build these [Executive Function] skills at home, in early care and education programs and in other settings they experience regularly, is one of society’s most important responsibilities. Growth-promoting environments provide children with “scaffolding” that helps them practice necessary skills before they must perform them alone. Adults can facilitate the development of a child’s executive function skills by establishing routines, modeling social behavior, and creating and maintaining supportive, reliable relationships. [developingchild.harvard.edu]
Initiation and Completion
Flexibility and Shifting
Lifestyle examples are powerful. Consider exercising, turning off the news, stop social media, go on a drive vs home with TV.