Andy Johnson/KE7TMU, the Deschutes County ARES Emergency Coordinator, recommends the following three FEMA certification courses for amateurs interested in participating in emergency services activities:
IS-100 Introduction to Incident Command System
IS-200 ICS for Single Resources and Initial Action Incidents
IS-700 National Incident Management System (NIMS), An Introduction
The courses can be taken online, and are self-paced. The exams can also be taken online.