G.,
I too am a stay at home mom, but am also a pediatric Occupational Therapist. I have worked with many kids with VP disorders, and have found many things to be effective. It does take some time,support, and follow through of all her educators.
From an OT perspective, there are many strategies, but the more specific you can be the better and more exact the strategies I give are.
Kids with VP disorders alot of times have a hard time descrininating between useful and non-useful information in a visual field, (figure-ground)and affects reading, writing, copying from a board. I have found that "I spy" computer game to be really fun for the 6-10 year olds that I have worked with. I also like the Visual Perceptaul skill building books (or CD Rom), these are by critical Thinking software. CriticalThinking.com. Puzzles, and word searches are also great ways to train the eyes.
Hope this helps if you need or want any more info I could ramble on for hours!
I have also referred to Vision Therapy, but only when skills gained through private and School Based OT have plateaued, or no improvement has been made.