I have not started teaching yet, but am certified thru Mad Dogg Athletics. It's very well known. They protect the offical "spinning" name fiercely. The club must meet certain criteria to call their program "spinning". Otherwise, it's some other name of stationary cycling. Granted you do not have to teach at a "spinning" only certified facility. Unless the management requires their specific program. I think it is a well developed model that would be worth your time if those are your desires.