Are you reading OPGTR right out of the book?
We struggled at first, but I started to write everything on a whiteboard. One word at a time and one sentence at a time. She does not read anything out of the book. I think that all of those words on one page is way too intimidating.
It made a world of difference! She really enjoys the short lessons. If a lesson is too long, I will split in into two days.
Another suggestion I have is to do it daily, even if you only do 10 min each day.
We have really fallen in love with OPGTR. We are more than half way through now.
HTH, Kristen