If you are a new chorister and don't have this book, GET IT!! It's not published by the church but was originally intended to be. Our Primary owns a copy - I'd suggest asking if there's money in the budget to buy a copy that will stay with your calling. You can purchase this book on Amazon here:
I speak often of Sister Pat Graham (she usually does a workshop each January so watch for updates from me about those) and she's one of the authors of this book. She also wrote 5 Primary songs in The Primary Songbook and was on the committee that it together. She's an amazing and talented woman when it comes to teaching music to children.
I use lesson plans from this book quite often and try not to infringe on copyright material by not posting specifics about lessons. So if you ever want to get the full version, you'll need to arm yourself with a copy!