Could you please send me IELTS or Duolingo preparation material?

Here are the best books for IELTS preparation:

1.The Official Cambridge Guide to IELTS

2. Barron’s IELTS Superpack

3. Simone Braverman’s Target Band 7

4. IELTS Practice Tests Plus 2 with Key and CD Pack

5. Cambridge IELTS 15 Academic Student’s Book with Answers

Apart from this, you can get FREE IELTS test prep tips, tricks and FREE resources curated by Study Abroad Experts and top school alumni here. 

 

Here are a few tips for you to begin your preparation for Duolingo English Test:

You need to have a clear understanding of the Duolingo English test pattern, Duolingo English test scores, and question types from the ‘quick video walkthrough’ on the Duolingo website.
Proceed towards the ‘Test Readiness’ page, check out the Duolingo Official Guide, and a few of the Duolingo English practice test papers for understanding the difficulty levels of questions.
You need to undergo the daily practice of reading, speaking, writing, and listening sections of English. The Duolingo blog section contains helpful resources that can provide you with English material for everyday practice.
The Duolingo English practice tests can also help you analyze the difficulty level of the questions. Also, Duolingo mock test can be taken on a regular basis to strengthen the weaker section.

Let me know if this helped and if you want any other information from my end.