For decades, sailing schools had difficult choices to make in choosing boats for their basic sailing programs.  The ideal boat didn't exist in the real world.  Glenn Card pioneered the transition from the traditional Soling used by many programs (his included) to more appropriate teaching boats.

After mixed success with the J-24 (an excellent racing boat that's of very questionable merit for basic instruction), he settled on the Sonar, a 23-foot day-sailor and club racer that represented the greatest single advance in sailing school fleets and is still one of the better boats for the purpose, second perhaps only to our current Beneteau First 21  (in our humble, but considered, opinion).  Glenn even became the largest dealer for the Sonar.

Always quick to recognize the the tools and methodology of the future, Glenn was one of the earliest operators to get involved with the American Sailing Association, doing so in its inaugural year of 1983.  National standards for sailing schools, instructors and students did not exist in America prior to that.  Glenn immediately brought his school on board, and all instructors on the staff now had to earn these important credentials.

My father and I both earned our ASA certifications in October of 1983.  Glenn was certified to the level of Advanced Coastal Cruising Instructor, and even achieved the status of Instructor Evaluator up through the Basic Coastal Cruising level.  Other instructors on his staff became Instructor Evaluators at levels as high as Advanced Coastal Cruising.  (Instructor Evaluators run the certification clinics and determine the abilities of the candidates, and whether they qualify for certification.)