The Teaching Knowledge Test (TKT) - is a test about teaching English to speakers of other languages. It aims to increase teachers' confidence and enhance job prospects by focusing on the core teaching knowledge needed by teachers of primary, secondary or adult learner.
The Teaching Knowledge Test (TKT): Module 1. Language and background to language learning and teaching[issued by University of Cambridge ESOL Examinations, 2011]
The Teaching Knowledge Test (TKT): Module 2.Planning lessons and use of resources for language teaching[issued by University of Cambridge ESOL Examinations, 2011]

CAE (Certificate in Advanced English) - is an examination at an advanced level, requiring competence in all the language skills, set at level C1 of the Council of Europe's Common Framework for languages.
Cambridge English: Advanced (CAE)[issued by University of Cambridge ESOL Examinations, 2008]