A2 Key for Schools is one of the Cambridge English Qualifications. It is an exam for school-age learners which will help prepare them for higher-level English language qualifications.
A Cambridge English: Key (KET) for Schools qualification shows that a student can use English to communicate in simple situations. The exam gives students the confidence to go on to study for higher-level English exams, such as Cambridge English: Preliminary (PET) for Schools.
Cambridge English: Key for Schools is targeted at the same CEFR level as Cambridge English: Key (KET), but with content aimed at school-age learners rather than adults