The International English Language Testing System or IELTS

 Above and lower photos from: https://www.ielts.org

As far as IELTS information is concerned, one website seems to have it all: 

the "Home of the IELTS Language Test," with  https://www.ielts.org  as 

its universal resource locator (URL).

   There are six menu columns near the title page. These are, from left to 
   right, the following:

[1] "What is IELTS,"

[2]  "About the  test,"

[3]  "Booking a test,"

[4]  "IELTS for organizations,"

[5]  "Teaching and research," and

[6]  "IELTS in the USA."

[1] WHAT IS IELTS  consists of  four (4) sub-menus or topics. They are readily accessible by clicking on each. 

Just the same, though, I include their respective  URLs for your ease of access--that is, if you would like to go direct to the pages without going through the  homepage protocol. 

IELTS introduction

https://www.ielts.org/what-is-ielts/ielts-introduction

IELTS for migration

https://www.ielts.org/what-is-ielts/ielts-for-migration

IELTS for study

https://www.ielts.org/what-is-ielts/ielts-for-study

IELTS for work

https://www.ielts.org/what-is-ielts/ielts-for-work

[2] ABOUT THE TEST  has ten (10) sub-topics:

Two types of IELTS test

https://www.ielts.org/about-the-test/two-types-of-ielts-test

Paper or Computer

https://www.ielts.org/about-the-test/paper-or-computer

Test format

https://www.ielts.org/about-the-test/test-format

Sample test questions

https://www.ielts.org/about-the-test/sample-test-questions

How IELTS is scored

https://www.ielts.org/about-the-test/how-ielts-is-scored

Who accepts IELTS scores?

https://www.ielts.org/about-the-test/who-accepts-ielts-scores

How we develop the tests

https://www.ielts.org/about-the-test/how-we-develop-the-test

Ensuring quality and fairness

https://www.ielts.org/about-the-test/ensuring-quality-and-fairness

Test security

https://www.ielts.org/about-the-test/test-security

Publications

https://www.ielts.org/about-the-test/publications

         This last (fast becoming my favorite), offers free downloads 
         (ahh, that's why)--with options to choose either a UK or US 
         version--on each of the following:

         Guide for agents,

         Guide for institutions,

         Guide for teachers,

         Ensuring quality and fairness in international 
               language testing, and

         Results verification service.

[3] BOOKING A TEST consists of seven (7) sub-menus:

How do I register?

https://www.ielts.org/book-a-test/how-do-i-register

Prepare for your IELTS test

https://www.ielts.org/book-a-test/prepare-for-your-ielts-test

Find a test location

https://www.ielts.org/book-a-test/find-a-test-location

On test day

https://www.ielts.org/book-a-test/on-test-day

Special requirements

https://www.ielts.org/book-a-test/special-requirements

Getting your results

https://www.ielts.org/book-a-test/getting-your-results

Resitting the test

https://www.ielts.org/book-a-test/resitting-the-test

[4] IELTS FOR ORGANIZATIONS  is composed of seven (7) sub-topics:

Why accept IELTS scores?

https://www.ielts.org/ielts-for-organisations/why-accept-ielts-scores

Setting IELTS entry scores

https://www.ielts.org/ielts-for-organisations/setting-ielts-entry-scores

Show you accept IELTS

https://www.ielts.org/ielts-for-organisations/show-you-accept-ielts

IELTS scoring in detail

https://www.ielts.org/ielts-for-organisations/ielts-scoring-in-detail

Processing and verifying IELTS results

https://www.ielts.org/ielts-for-organisations/processing-and-verifying-ielts-results

Common European framework

https://www.ielts.org/ielts-for-organisations/common-european-framework

IELTS Online Tutorial

https://www.ielts.org/ielts-for-organisations/ielts-online-tutorial

[5] TEACHING AND RESEARCH has  six (6) sub-topics:

IELTS for teachers

https://www.ielts.org/teaching-and-research/ielts-for-teachers

Examiner recruitment and training

https://www.ielts.org/teaching-and-research/examiner-recruitment-and-training

Research reports

https://www.ielts.org/teaching-and-research/research-reports

Test statistics

https://www.ielts.org/teaching-and-research/test-statistics

Grants and awards

https://www.ielts.org/teaching-and-research/grants-and-awards

Call for research proposals

https://www.ielts.org/teaching-and-research/research-proposals

[6] The last column, IELTS IN THE USA, features  three (3) interesting subject areas--with the last one becoming my third best information.

IELTS for organizations

https://www.ielts.org/usa/ielts-for-organizations

IELTS for test takers

https://www.ielts.org/usa/ielts-for-test-takers

IELTS for prospective test centers

https://www.ielts.org/usa/ielts-for-prospective-test-centers

Now, between my first and third best choices is my second--and I think  

you'll agree with me: the sample test questions, together with 
the IELTS Online Tutorial--which is FREE!

A Blessed Day, Everyone!

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Much appreciate it! ]