Not only has English become an international language; it is used by more and  more people around the world as a medium of post-school study.
 To help universities and colleges select students with sufficient English skills  to succeed in their courses, The IELTS test was introduced in  1989 to assess “whether candidates are ready to train in the medium of English”.  It is now used for this purpose around the globe.
Depending in the course of study that students plan to take, students must elect  to sit either the  Academic IELTS test or the General  Training IELTS test. This choice must be made when applying to sit the test. The  Academic IELTS test is necessary for students who plan to study at university  (undergraduate or postgraduate courses), and will test the student’s ability  both to understand and to use complex academic language. The General Training  IELTS test is required by other institutions, such as colleges and high schools,  for courses that require less complex language skills, and is also as a general  test of English proficiency e.g. for immigration purposes in Australia, Canada  and New Zealand.
The Test Format
There are four sub-tests, or modules, to the IELTS test: Reading, Writing,  Listening and Speaking. Students must sit all four sub-tests. While all students  take the same Listening and Speaking tests, they sit different Reading and  Writing tests, depending on whether they have selected the Academic IELTS test  or the General Training IELTS test.
On the day of the test, the four subsections will be taken in the following  order:
Total Test Time
2 hours 45 minutes
 The Speaking test may even take place a day or two later at some centers.
IELTS listening test   lasts for about 30 minutes. It consists of  four sections, played on cassette tape, in order of increasing difficulty. Each  section might be a dialogue or a monologue. The test is played once only, and  the questions for each section must be answered while listening, although time  is given for students to check their answers.
IELTS Reading test   lasts for 60 minutes. Students are given an  Academic Reading test, or a General Training Reading test. Both tests consist of  three sections, and in both tests the sections are in order of increasing  difficulty.
IELTS Writing test   also lasts for 60 minutes. Again, students  take either an Academic test, or a General Training test. Students must perform  two writing tasks, which require different styles of writing. There is no choice  of question topics.
IELTS Speaking test   consists of a one-to-one interview with a  specially trained examiner. The examiner will lead the candidate through the  three parts of the test:
An introduction and interview, an individual long turn where the candidate  speaks for one or two minutes on a particular topic, and a two-way discussion  thematically linked to the individual long turn. This interview will last for  approximately 11-14 minutes.