I'm having focusing problems with my dog as well, although a slightly different variety.

Would they allow treats in the class? With Rosie, that deffinitly helps to spark her interest. I would also suggest training in areas of more distraction like your front yard, out in the street, at a park etc. On other idea is to get to the class location a bit earlier so your dog has time to settle.

Rosie is really smart and picks up on things quickly. She is also very attentive to me and will work for food and praise and loves training. But once we get outside, it's a different story. She gets that "yeah whatever, there are other things I want to be doing" attitude. She still performs, but does it so slacked, unenthusiastically and aloof. Like on a heel, she hardly even looks up at me, she still heels, but is hardly paying any attention. She also knows her name which is like "watch me" to us, but once we're outside, she is completely deaf. Sometimes the only way I can get her attention is to physically touch her, like not a correction or to hurt her, just a touch. I'm trying to do rally with her and at our first class meeting, I couldn't keep her nose off the ground so I totally know where your coiming from about how frusterating it is.