IELTS

Although there are other English Language Assessment Tests available, IELTS is preferred over them for a number of reasons:
IELTS is the world’s most popular English language proficiency test with more than 2.5 million tests taken in more than 140 countries in 2014, up from 2 million tests in 2012; recognized by more than 9000 organizations in 135 countries for study, work and migration purposes.
IELTS is the only English language test where the Speaking test is one-on-one with an examiner in a private room without any distractions.
Research shows that IELTS motivates test-takers to develop real and well-rounded English rather than learning by memorizing. This means that the understanding of English is improved and it prepares the test taker for the real life in an English-speaking country.
IELTS test content is developed by an international team of experts and undergoes extensive research to ensure the test remains fair and unbiased for any candidate regardless of nationality, background, gender, lifestyle or location.
IELTS Examiners are fully qualified and follow the IELTS standardized testing around the world. They have a quality-controlled system of recruitment, training, benchmarking, certification and monitoring. The markers are regularly monitored and tested every two years to retain their certification.
The IELTS scoring system grades scores consistently. It is secure, benchmarked and understood worldwide. Test materials are designed carefully so that every version of the test is of a comparable level of difficulty.