Most jewelry schools and jewelry programs offer classes in repair. Here are a few schools that offer jewelry repair classes, but there are lots more out there. To find more, try searching using the terms "jewelry repair" using an Internet search engine:

Stewarts Internationalin Jupiter, FL
Revere Academy of Jewelry Arts in San Francisco, CA
Wildacres ( in Little Switzerland, NC) and William Holland (in Young Harris, GA) both can be accessed through the same web site.

Drouhard National Jewelers School in Columbus, OH 888-ONE-WEEK
Miami Jewelry Institute in Miami, FL 305-573-5707
Jewelry Design Institute in Richmond, VA 1-800-756-1227
Studio Jewelers, Ltd. New York, NY 212-686-1944