Key Words with Peter and Jane uses the most frequently met words in the English language as a starting point for learning to read successfully and confidently. The Key Words reading scheme is scientifically researched and world renowned. Book 9c provides the link with writing for the words used in Readers 9a and 9b. Once the book has been completed, the child can move on to book 10a. The Key Words with Peter and Jane books work because each of the key words is introduced gradually and repeated frequently.