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. In Book 9b, Peter And Jane Visit An Air Show And Introduce 109 New Words, Including Sometimes, Interesting, Jumping And Balloon. O 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. In Book 9b, Peter And Jane Visit An Air Show And Introduce 109 New Words, Including Sometimes, Interesting, Jumping And Balloon. Once This Book Has Been Completed, The Child Moves On To Book 10b.