- The Practice Tests Plus series thoroughly prepares students for the Cambridge ESOL exams by providing authentic practice as well as useful tips to enhance students" exam success. "Teaching not just testing" improves students" exam performance by offering guidance on how to approach each task type and training students on how to choose the right answer.This edition of the KET level includes:• FOUR complete practice tests in exam format.• Ready-to-use lessons introducing each task type in Tests 1 and 2.• Practice of key vocabulary and grammar tested in the exam.