First Aid
The overriding importance is of getting medical and/or adult help as soon as possible.
you should know
how to deal with severe bleeding
how to ensure an airway is clear, and how you would carry out emergency resuscitation
how to put someone in the recovery position
how to treat a burn or scald
how to recognise and treat shock
The links above are on the Red Cross Everyday first aid - web pages.
British Canoeing have launched useful online first aid elearning
Vinnie Jones shows you how to carry out emergency resuscitation (CPR) below