The Key Stage 3 books have been revised into a simpler structure that supports the Framework for Teaching Mathematics; Years 7, 8 and 9, both in its specific content and in its general interactive approach to teaching. SMP Interact is a major mathematics course for Key Stages 3 and 4. Practice for Book 7S provides additional structured material to accompany the first book in the S (square) series. All the materials have been fully trialled in the classroom, and working teachers from a wide variety of schools have been involved at all stages of writing, trialling, and improving. 2003. Suitable for use in class, it is also ideal as an inexpensive homework resource, especially when the school does not let pupils take textbooks home.