WRI's most frequently asked question after a river rescue class =
"What's the best 1st Aid training I can take?"
 WMI of NOLS Wilderness Medicine & First Aid Courses 
All Wilderness Medicine courses are taught through the Wilderness Medicine Institute of the National Outdoor Leadership School, or WMI of NOLS. WMI is the leader in wilderness medicine, providing the highest quality education and information for the recognition, treatment, and prevention of wilderness emergencies. WMI’- teaching philosophy is to emphasize treatment principles and decision-making, not the memorization of lists. Scenario-based teaching is employed as a complement to lecture style instruction. This is why students learn so well and feel confident in employing their newly acquired judgment and skills. WMI has courses ranging from 2-days to 5 or 10 or 28-days long, to full 90-day Medicine & Rescue Semesters. See full Course Descriptions Here.
More information and more listings at nols.edu/wmi.
WRI sponsors WMI courses on request.
Wilderness Rescue International (WRI) is separate from Wilderness Medicine Institute (WMI).
The most popular option is to do a combo course of a 2-day WFA class with a 3-day River Rescue course.  

The WMI of NOLS Course Descriptions