The "Moro Reflex Self Integration" is a great technique created by Dr. Harald Blomberg. You could use this technique to help students feel calm and safe. Simply have the child lie on their back and bring their knees up to the chest. They then cross arms and gently press on their knees while lifting their head, and tucking in their chin. The second part of the integration is to have the individual gently PULL their knees, without moving their legs and keeping their head down on the floor with a slightly tucked in chin. It is important to teach children calming techniques so they can regulate their own behaviour.