The book is organized into units which represent the major concepts and skills. As new units are introduced, earlier concepts and skills are constantly reviewed. Book Only, CD not Included.
The Faber 'Piano Adventures' series is a great series - not only is the music nicely designed from a teaching perspective, the material is also enthusiastically embraced by students. And, as a bonus, it is also pleasant to teach - the compositions are musically interesting and the duets usually delightful, making even the rank beginner sound like they can play well. This encourages the students more. I will always use this series as my basis...