The Certificate in English Language Teaching to Adults, or CELTA,'s a professional credential held by many teachers of English as a foreign language. Overview The CELTA's a common requirement for those entering the field of English language teaching. Because it's recognised internationally, it's a particularly popular credential among people who wish to travel and teach English around the world (see TEFL for an extended discussion of travel-teaching). However, it's also held by people who int… (More on Celta)