Its not often mentioned here, but is very effective so I wanted to bring it to your attention. In addition to PAF they use their own expository writing program, which I think is home grown and is sort of what they are famous for. Anyway, here’s the link:
http://www.pafprogram.com/
Yes, PAF is a Orton Gillingham based program (they do work, given competent instruction and the necessary no. of hours to do them).
—des