Trinity Diploma in TESOL

If you have been teaching for more than two years then you may be ready to transform your teaching and advance your career with the Trinity DipTESOL.

  • Study for 7 months online (about 10 hours per week) followed by 3 weeks face to face (full-time)  in Barcelona, Prague, Kerala, Cadiz or Hong Kong
  • Flexible: during the on line phase you study at the most convenient time for you. We schedule the course as 10 months, but you can take up to 3 years if you need more time.
  • Train in a positive, dynamic and supportive learning environment
  • Learn from world class tutors, including Lindsay Clandfield, Scott Thornbury and Adrian Underhill
  • Transform your teaching and improve your chances of finding some of the best positions in ELT
  • Gain a prestigious, internationally-recognized qualification

Teach anywhere in the world with our accredited TEFL courses

Who is this course for?
The Trinity Diploma in TESOL is for experienced teachers of any nationality who are looking for an advanced professional qualification in teaching English as a Foreign or Second Language. In most cases, participants are working in language schools and universities around the world or teaching privately.

What is the course like?
You will study for seven months online followed by three weeks face to face in Barcelona, Prague, Cadiz, Kerala or Hong Kong. The online phase offers plenty of opportunities for interaction with participants from all over the world.  Our aim is to encourage the support and sharing of ideas between participants.  To achieve this we ensure that you are in regular contact with each other in our virtual classroom, forum discussions, webinars and live video conference classes.

There are twenty, week-long modules which you are expected to contribute to regularly, but the interaction is not scheduled (other than a 45 live video class), so you can log into the course throughout the week to suit your own working day. Each week one of our tutors will lead the module, interacting with you in forums and webinars to ensure maximum support and feedback. They will encourage, support and challenge you to develop to your full potential, while ensuring you are preparing effectively for the four assessed units of the Trinity DipTESOL. Every four or five weeks you have a rest week with no module. 

What can I expect to learn during the online phase?
Our goal is to provide a course which is dynamic and practical and meets the needs of the participants so your work in our virtual classroom will be backed up with tasks which get you to apply ideas in your own classroom. With a team of highly experienced and qualified tutors, the online modules will help you to deepen your theoretical knowledge and practical skills while preparing for the four assessed units of the Trinity Dip TESOL course:

  • Unit 1: Teacher Development and Language Awareness
  • Unit 2: Research projects
  • Unit 3: Phonology
  • Unit 4: Teaching practice
What areas do we cover during the online course?

 Learning and teaching

  • Teachers
  • Learners
  • Methodology
  • Professional Development
  • Developing the four skills
  • Teaching Young Learners
  • Technology
  • Assessment


  • The Phonemic Chart
  • Vowels and consonants
  • Word and sentence stress
  • Features of connected speech
  • Intonation
  • Phonology and English as an International Language


  • Describing language
  • Word grammar and sentence analysis
  • Grammar teaching
  • Discourse
  • Lexis


  • Three action research projects supervised by a tutor where you develop your teaching and professional expertise in areas of your choice.
  • Lesson planning: creating effective lesson objectives and lesson procedures
  • Reflecting on teaching and developing your skill set and teaching tool kit
  • Integrating pronunciation into teaching


What will I do during the face to face phase?
The face-to-face phase is a three week intensive course taken after the seven month online phase. There is a choice of dates and locations available. This part of the course includes:

  • Teaching practice, including lesson planning, observation and feedback from tutors.
  • Time working individually and with support from tutors. You will have four internally assessed lessons and one externally with a Trinity examiner. You will also have an opportunity to be teaching without being assessed to get to know the students and get feedback and advice from tutors.
  • External assessment of phonology and teaching practice with Trinity examiner.

How will I be assessed?
There are four assessed units on The Trinity DipTESOL course. Unit 1 and Unit 3  are assessed by Trinity College and Unit 2 and Unit 4 by Trinity College and OxfordTEFL together.

  • Unit 1
    A written exam taken in one of our centres, or in other Trinity approved centre, in May, August or November. The paper is three hours long and consists of a grammar section and two sections with essay questions about teaching and learning.
  • Unit 2
    A coursework portfolio including three action research projects. The projects involve observation of other trained teachers, reflection on your own teaching and a research project where you collect data. You work on the portfolio throughout the course. You will need to base the reflection task on teaching a group or groups of at least 6 students for 15 hours in total
  • Unit 3
    A 30 minute interview with a Trinity examiner on phonetics and phonology.
  • Unit 4
    Assessment of your teaching of five one hour lessons (60 mins) each preceded by a discussion of your lesson plan (10 minutes) and followed by a discussion of the lesson with the examiner (20 minutes). You will also present a portfolio of documentation related to these lessons. Four lessons are assessed the fifth by a Trinity examiners. For this part of the exam you will be teaching students in one of our centres. You may be able to complete up to two of the Oxford TEFL assessed lessons via video with your regular students prior to the face to face part of the course.

What qualification will I gain on successful completion of the course and how will it help me?
Once you have completed the course and passed the assessments you will be awarded the Trinity Diploma in TESOL. This is an internationally-recognized and respected advanced professional qualification for English Language Teaching. It can be used as credit for teachers wishing to study an MA in TESOL.

This qualification opens doors into other areas of the ELT profession. Our graduates have gone on to become:

What support do I receive in order to help me find work after the course?
We are committed to providing our graduates with the best lifelong careers support possible. We work with you before, during and after the course to help you secure a new job if that is your aim. Since 1998, we have helped hundreds of our graduates find work all over the world. We have an Oxford TEFL Jobs Facebook page which is updated regularly with jobs around the world.

You can also stay in touch with our community of teachers, trainers and graduates by joining our Trinity DipTESOL Facebook group (exclusively for our teachers, graduates and trainers).

Read more about our careers service

See the required reading list for this course

How can I enrol in the Trinity DipTESOL course?

Step 1: Complete the application form

Step 2: You will be contacted within one working day to arrange a telephone/ Skype interview with the course director. We will ask you about your teaching experience and language awareness to help decide whether this course is suitable for you.  The interview is also an opportunity for you to ask questions about the course and decide if it is right for you.

Step 3: If your interview is successful, we will email you a full place offer with information about how to reserve your place on the course by paying your deposit.

What payments will I need to make?

Course fees:

There are two options for making payments for your Trinity DipTESOL course:

Option 1: Full fees in advance: €2600

Deposit €450 to reserve your place (deducted from your remaining course fees)

Option 2: Payments in installments: €2700

Deposit €450 to reserve your place (deducted from your remaining course fees)

3  installments in your second, fourth and sixth month of the course.

See all course and examination dates (link)

Examination fees:

Your examination fees will need to be paid at least eight weeks before your first assessment. The examination fees in 2018 are €500 for all four units.


You will need to purchase/get hold of six books which will cost around €100 in total, depending on Amazon offers. Check the reading list here (link).

What are the entry requirements for the Trinity DipTESOL course?


At least two years full-time teaching experience (or equivalent) teaching English as a Foreign or Second Language. The experience can be with any age group or in any teaching context.


A Certificate in TESOL/CELTA and a degree or proof that you would be able to cope with a course of study at post degree level.

When can I take the Trinity DipTESOL course?

We offer two dates per year to begin the 7 month online phase: January and October. The face to face phase usually takes place in the summer.

We are also able to run alternative dates/locations where there are a minimum of 6 teachers interested. (For example in the cases of teachers from the same school or network of schools)

“Completing the Diploma has been one of the best decisions I have made in terms of professional growth and self-actualisation. The dedicated tutors gave me constructive criticism, targeted at improving my competency in a step-by-step way, raised my awareness and … Continue reading

Alan Wong, Canada/Hong Kong

See more testimonials from this course