We used this book for 3 kids. The Cds worked ok for the last child but they do look a bit scratched - a few years ago, I did call the company and they replaced one of my cds. I took photographs of the textbook pages but since then I have erased as much of the pencil markings as I can. There are a few lessons filled in with pen. I have priced it well to sell and hope that it helps you keep up the homeschooling wherever you are!