School for Dog Trainers?

You're definitely better off with "hands on" experience. I've met DOZENS of "Master Trainers" (About $50-75K worth of schooling) that can't train a dog. The certificates really are bogus. Then again, marketing is a big factor in business. A lousy trainer may make a better living than a good trainer because of what he advertises. I see some trainers with their list of "Qualifications"....and 99% of the qualifications are simply organizations they belong to. I could pay memberships to every dog club in hte world, and advertise that as "qualifications". It may not mean a hill o' beans, but to the untrained client, it looks like you're gods gift to dog trainers.