The NRA offers many educational resources and guides. If you want to learn more after your lesson, it's a great place to look.
Firearms legislation is more than a little complicated. For guidelines and registration (on the federal level at least), the Bureau of Alcohol, Tobacco, Firearms and Explosives has everything you need.
The Professional Association of Diving Instructors has resources for anything diving related you might want, from the beginner level to advanced.
Emergency First Response
Emergency first response is a fantastic central location for anything first aid related. In addition to information posted directly on the site, they offer courses in CPR and emergency first aid.
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