The International English Language Testing System, or IELTS™, is an international standardized test of English language proficiency for non-native English language speakers. It is jointly managed by the British Council, IDP: IELTS Australia and Cambridge Assessment English, and was established in 1989.

Score / grade validity: 2 years Score / grade range: 0 to 9, in 0.5 band increments Countries / regions: More than 1,200 test centres in over 140 countries. Scores / grades used by: More than 10,000 colleges, agencies and other institutions in over 140 countries. Annual number of test takers: Over 3 million in 2017.

Knowledge / skills tested: Listening, reading, writing and speaking of the English language Purpose: To assess the English language proficiency of non-native English speakers