本系列書結合最新進實務教學法及最啟發青少年主題，包含 KET for Schools 考試所有細節部分，提供考試準備、實務練習及應考建議以確保學生充足準備應考。並依據劍橋學習語料庫（Cambridge Learner Corpus），本語料庫收集全球所有考生真實考卷，真實語料來源確保為常見考題及考生常犯錯誤，是坊間所有 KET for Schools 考試準備中，最真實完整的課用書。
Complete Key for Schools is official preparation for the Cambridge English: Key (KET) for Schools exam. It combines the very best in contemporary classroom practice with engaging topics aimed at younger students. The information, practice and advice contained in the course ensure that they are fully prepared for all parts of the test, with strategies and skills to maximise their score.
Informed by Cambridge's unique searchable database of real exam candidates' answers, the Cambridge English Corpus, Complete Key for Schools includes examples and exercises which tackle common problem areas at this level.
The CD-ROM contains grammar and vocabulary exercises for motivating, flexible study.