If you find a casualty that is unconscious this is the procedure you would use.
A=Airway: Place your finger and thumb on the chin gently. Then push down softly and open the casualty’s mouth, this opens the airway.
B=Breathing: To make sure they are breathing place your hand on their stomach and ear at their mouth. Try to hear or feel breathing or even look for the stomach movement.
C/P= Circulation and pulse: Take your two middle fingers and place them in the middle of their throat. Take two steps  to the side and feel for movement.
Mr Bell is the man that taught us first aid. We had 6 hours with him (2 hours for 3 days).