Cambridge ESOL offers the widest range of English exams in the world. More than 11,500 organizations worldwide recognize Cambridge ESOL exams. Cambridge ESOL works with education ministries to develop English assessment programs. In Mexico, Cambridge ESOL worked with SEP and the BBC on an adult English distance learning course that includes assessments at three levels related to Cambridge exams. The document then provides information about the Key English Test (KET) and Preliminary English Test (PET), including exam structure, certificates awarded, and benefits of taking the exams.