Childhood trauma is often described as adverse childhood experiences. The events they experience is emotionally painful either physically, mentally, or both and result in lasting mental and physical effects. Children will most likely have a heightened stress response which often results in their inability to self regulate their emotions.
There are many resources available for viewing; check out Youtube, TED Talk, and Trauma Informed Positive Behavior Support, Dr. Nadine Burke Harris
There are many more resources for your viewing please take the time to check them out.