See though, if they're just this asana, that asana, are you ever learning anything? There are years of intricacies in a sun salutation, and again, there's just no way you can do one in good alignment without putting a lot of attention into foot placement and hand placement. In a gym setting, a lot of the teachers just don't even know enough to make good corrections. That's not limited to yoga - but yoga is one of those things where there ARE good, dedicated studios in addition to junky gyms. It's a lot of why I got away from group fitness. Too many people want to just go and sort of put their bodies in ways that sort of look like what the instructor is sort of doing, and don't care whether they're injuring themselves or just not getting the benefit of what they're doing. Too many authorities will certify instructors without any kind of proof that they can see and correct a student's alignment. Bleh.