Right handed, left eye dominant, and a better shot with my shotgun than my hunting buddy or my dad. I can't explain why, but I almost think it helps. Growing up, my dad would say "Look at the duck, but see the bead." I couldn't do it, so I just learned to look at the duck and just kind of "know" where the gun was pointing, almost like an extension of my body. My hunting buddy has done all kinds of stuff to improve his shooting - fiber optic beads, red dot sights, you name it. It frustrates him no end when I make a good shot and when he asks what I see in my sight picture, I say "A duck." But it's the truth - I don't even notice the bead.
I recommend taking her shooting and have her practice shooting stationary targets with both eyes open, so she can get a feel for where the gun hits. When she can consistently hit stationary targets, try simple trap shots. I think for us goofy shooters, it is a matter of practice more than anything else.
Hope this helps,
Chris