A certified first responder is a person who has completed a course and received certification in providing pre-hospital care for medical emergencies. They have more skill than someone who is trained in basic first aid but they are not a substitute for advanced medical care rendered by emergency medical technicians (EMTs), emergency physicians, nurses, or paramedics. First responder courses cover cardiopulmonary resuscitation (CPR), automated external defibrillator usage, spinal and bone fracture immobilization, oxygen and, in some cases, emergency childbirth as well as advanced first aid. The term "certified first responder" is not to be confused with "first responder", which is a generic term referring to the first medically trained responder to arrive on scene (police, fire, EMS). Most police officers and all professional firefighters in the US and Canada, and many other countries, are certified first responders. This is the required level of training. Some police officers and firefighters take more training to become EMTs or paramedics.
The EFR workbook is located here
The EFR workbook answer key is located here