older partnerships
The thing about Growing Readers is that it is a little more targeted to first grade. In workshops with Kathy Collins, she has said that once they can read chapter books- or easy readers even (around a J?)- partner reading is not so much about reading together. Unless, of course, there is a partnership who really needs the fluency work.
Partnership from about 2nd grade up are more about conversations. Partners are long term because this way they know each other as readers. They can chat about the book they are reading and recommend books to each other.
I teach partnership like Kathy, except with different teaching points. She has a chart that says "ways readers read together" or something. (Choral, page/page) My chart says "things partners can talk about" It's a little different every year. It starts out with easy things- like favorite part, funny part. I try to add to it throughout the year. So that later in the year it can have some things we've talked about- like the heart of the story. Or how this book is like/unlike the author's other books.
This year, I taught my kids that one thing they could do during partner time is swap books. (Mine are always on-level partners) It worked well. Some would just recommend - I loved this, you should read it. But others would plan ahead: I'll read this Magic tree house, you read that MTH and we'll swap after.
I think the most important thing to remember about parnterships is that they need to grow through the year-- and change A LOT! I try to plan for at least 3-4 partnership minis throughout each unit.