Joseph Clay
Founder of ClayLingua | IELTS Study Tools & Research
Joseph Clay is the founder of ClayLingua, an IELTS preparation platform for Thai learners that he started in 2025. He also runs the ClayLingua IELTS Facebook group, where more than 1,500 Thai learners share their scores, ask questions and get study advice.
The guides come from those conversations. Joseph answers questions with real numbers, and he built the tools that answer them for each learner, including the free IELTS study planner, score estimates and practice drills. His short IELTS videos have been watched around one million times.
Joseph also built mock tests, drills, lessons and flashcards to help IELTS students progress quickly and reach their goals.
Before ClayLingua, Joseph started working as a software engineer in 2020, leading backend projects at large companies in the UK. He holds a BSc (Hons) in Software Engineering. This background is why ClayLingua's score estimates are built from data, not guesses.
He is a language learner himself. He speaks English, German, French, Spanish, Thai and Mandarin to various levels, so he knows how to progress in language learning.
His guides draw on official IELTS sources, such as the band descriptors and IELTS test statistics, and on published research into how scores change during preparation. Every guide lists its sources so you can check them.
How the guides are written
Written by Joseph from the official IELTS band descriptors, IELTS test statistics and the published research listed in each guide's sources, and shaped by the questions Thai learners ask most in the ClayLingua study group. Every figure links to where it comes from. Found a mistake? Tell us.
Guides by Joseph Clay
The Best Free IELTS Resources for Thai Students (2026)
The best free IELTS resources for Thai students in 2026, by skill: official practice tests, vocabulary, writing feedback, speaking and Thai YouTube.
How to Learn IELTS Vocabulary Fast: A Free Daily Method
A free 20 minute daily method for IELTS vocabulary: which topic words to learn, how many a day, and how to review them so you can use them in the exam.
How to Get IELTS Band 6 (6.0): Scores Needed, What to Study and How Long It Takes
IELTS 6.0 is about CEFR B2. See how many correct answers you need, how far your four scores are from 6.0, data from Thai learners and a 12 week plan.
Why Is My IELTS Writing Stuck at Band 5?
Stuck at 5.0 or 5.5 in IELTS Writing? See where band 5 essays lose marks in each of the four criteria, with examples, practice and a plan to reach band 6.
How to Get IELTS Band 5 (5.0 to 5.5): Scores Needed, What to Study and How Long It Takes
IELTS 5.0 is about CEFR B1 and 5.5 is the start of B2. See how many correct answers you need, what to study first and an 8 week plan to reach band 5.
How to Get IELTS Band 6.5: Scores Needed, What to Study and How Long It Takes
IELTS 6.5 is the top of CEFR B2. See how many correct answers you need, why 6.5 means some criteria at band 7, and a 12 week plan from 6.0.
How to Get IELTS Band 7: Scores Needed, What to Study and How Long It Takes
IELTS 7.0 is CEFR C1. See how many correct answers you need (about 30 out of 40), what band 7 Writing and Speaking look like, and a plan to reach it.
IELTS Band Scores Explained: Overall Score Calculator, CEFR and Every Band
How IELTS scores work: an overall score calculator, correct answers for every band, what each band means, and how IELTS compares with CEFR and TOEIC.
How Long to Prepare for IELTS: What You Can Improve in 1 Week, 1 Month or 3 Months
How much can your IELTS score improve before your exam? What research shows, what you can change in one week, one month or three months, and a plan for each.
IELTS Cost in Thailand (2026): Exam Fees at IDP and British Council, Booking and How to Save
IELTS costs 8,860 baht in Thailand at IDP and British Council (UKVI 9,750). Fees for every test, how to book, test dates, refunds and how to avoid paying twice.