If you have a student that has PTSD or TBI, allow them get go take a small break if their stress level is arising due to a situation.  This will allow them to cool down where they will be able to focus and not get upset. Also, by letting them know that they could bring in their service animal to help them get through class, will help them improve their mental state of mind.

How to incorporate IEP's into the classroom to better serve that student.  No matter if it is allowing more time for a test or accommodating in a different area. 

That TBI can cause someone to not sleep at all due to the fear of the triggered memory

PTSD can come from many various things and not just experiences from the military. 

PTSD is a condition that is caused by significant trauma that causes stress in the individual experiencing it. It can present as anxiety, inability to sleep, depression, trouble breathing, and panic. As well as it can cause psychological issues like inability to concentrate, bursts of anger and a general inability to function in society.

People with PTSD struggle to maintain relationships and consistent work. They may have low self-esteem and continually fail to succeed. Children with PTSD can carry that trauma into adulthood and struggle their whole life.

People who have experienced PTSD can become withdrawn from society and afraid… >>>

Holistic instruction is more effective and encompasses all learning styles.

Language is important in order to communicate effectively, and is influenced by one's cultural upbringing.

Race and culture tend to get "grouped together" but there are key differences that must be accounted for by the instructors. 

Being able to reach individual students through different methods keeping each individual student in mind will help to create a good learning environment.

Apps can be a great tool