Delta, or the Diploma in Teaching English to Speakers of Other Languages, is a post-experience, in-service teaching qualification, the aims of which are to enhance your professional knowledge and expertise and sharpen your practical teaching skills.

The most highly regarded and widely recognised qualification for experienced English language teachers, it is awarded by Cambridge English Language Assessment (formerly Cambridge ESOL), which is part of Cambridge University, and is ‘a widely recognised qualification which helps you build better teaching practice and can lead to greater rewards and enhanced career opportunities’ (Cambridge ESOL, The Delta Modules, 27/07/09).

Programme outline

Delta comprises THREE modules. Each module is independently assessed and separately certificated. You need to complete each module successfully to be awarded the Delta diploma.

Module 1 focuses on the background to teaching, the theory
that underpins it, practical applications and how these are
informed by linguistics and language learning theories.
It is assessed by a two-paper written examination.
More info
Module 2 aims to develop your professional practice. It
concentrates on your teaching and is assessed through
a portfolio of observed lessons, background written
assignments and an externally assessed lesson.
More info
Module 3 focuses on a specialist area of your choice
(e.g. English for Specific Purposes; teaching a group
from a particular cultural-linguistic background) and
is assessed through an extended written assignment.
More info

Who should apply?

It is recommended that a prospective candidate for the Delta Modules programme should EITHER be a graduate OR have a previous teaching qualification (e.g. CELTA), plus at least TWO years’ full-time teaching experience (i.e., 1,200 hours) within the past five years. Ideally, this teaching experience should include a range of levels and contexts. Non-native speaker candidates should have a minimum language level within a range of between C2 and C1 on the Council of Europe scale. Candidates may still be accepted who do not strictly meet the entry criteria but who demonstrate they would be capable of completing the course successfully. Decisions on entry are at NILE's discretion.


Course GBP (£)
Delta Module 1 Course fee 790.00
Courier and Cambridge Exam fee* 155.00
Total 945.00
Delta Module 2 Course fee 1940.00
Courier and Cambridge Assessment fee* 186.00
Total 2126.00
Delta Module 3 Course fee 390.00
Courier and Cambridge Assessment fee* 118.00
Total 508.00
Total Delta Fees 3579.00
Sign up for all three Modules and save £156!

If your application is being partly or fully funded by your institution,
please contact us for institutional offers.

*Please note that module fees are subject to change. Assessment/Courier fee is for the period 1 August 2019 – 31 July 2020.

The above course fees include VAT. For a breakdown, see the individual module fees information and CELTA and Delta payment options. For information on how to pay your course fees, see Payment options for CELTA and Delta courses.

Speak to an advisor +44 (0) 1603 664473

Frequently Asked Questions

Why Delta?

Delta is the most widely recognised and highly respected in-service training course for experienced teachers of English as a foreign language. Validated and overseen by Cambridge English Language Assessment (a division of Cambridge University) for over 30 years, Delta is the advanced teaching qualification that employers know and trust.

Delta: Is it possible to do a single Delta course for all three modules?

Delta was divided into three free-standing modules precisely because candidates were finding it increasingly difficult to follow a ten- or twelve-week face-to-face course or a six-month part-time course. There are still a few centres offering an all-in-one Delta course, but this is not an option offered by NILE.

Delta: Are the courses for the Delta modules delivered entirely online?

The courses for Modules 1 and 3 are delivered entirely online. Module 2 is administered online by NILE and supervised online by a local tutor, known as a Personal Delta Tutor (PDT), who also visits the candidate’s school or college to observe and assess their teaching on four occasions (the first of which is purely for diagnostic purposes).

Delta: Are there opportunities for online chat with tutors and other trainees?

Yes – as on all other NILE Online courses, there is a dedicated forum.

Delta: Can I do the three courses in any order?

Yes, although we strongly recommend doing Module 1 first to gain a grounding in the key areas.  Those teachers with greater experience and knowledge may be accepted onto Module 2 as a first component but this will depend on application and interview.

Delta: Do I need to be teaching a class in order to do the Delta Modules?

For Module 1 you do not need to be teaching a class.
For Module 2 you do need a class (minimum of 5 students) for your teaching to be assessed, although it does not have to be the same class for each of the four assessed lessons. Ideally the class(es) should be your own, though it could be a ‘borrowed’ class for the assessments.
For Module 3 you need a class (minimum 3 students), or access to a class, for one or two sessions, to conduct needs analysis and diagnostic assessment as the basis for a course proposal. You do not have to teach the course [Note: The class size requirement does not apply if you opt for Teaching One to One as your specialism].

Delta: Is there a time limit to complete all three modules?

No – there are no limits to the time that might elapse between modules.

Delta: How much work should I expect on each course?

15-20 hours per week for Modules 1 and 3, and at least the same for Module 2 for the 16-week option, but less for the 9-month option.

Delta: Should I do the Delta or a Masters course?

This depends very much on your personal career objectives. The Delta is a much more practical teaching qualification than most Masters courses, but if you are thinking of doing the Delta first and then going on to do a Masters, it is worth noting that a Pass in all three Delta modules can be accepted by the University of Chichester as Accreditation of Prior Learning, counting for 60 credits and giving you exemption from the core module of NILE’s MA. NILE has created a video that tells you more about choosing between the MA & the Delta.

Delta: What happens if I fail?

For Module 1 you can re-take the exam without re-taking the course. Similarly, for Module 3 you can submit a fresh assignment (or a revised version of your original assignment) without re-taking the course; however, you may well wish to re-enrol for a reduced version of the course, so that you can benefit from further supervision. The nature of Module 2 means that you would have to re-take the entire course (though perhaps without the need for another diagnostic lesson For Module 2, you would normally not submit your work unless it was to standard and so you would only ‘Fail’ the External.  This can be re-taken within a year.  If the entirety of your portfolio is judged to be a fail, you would have to re-do the whole course.). For Module 1, on payment of a moderate fee, you can request a clerical check of the mark awarded, or to have the papers completely re-marked. (However, it is not possible to obtain any detailed commentary on exam performance.) For Modules 2 and 3, on payment of a moderate fee, you can request an individual assessor’s / examiner’s report to get detailed information on your weak areas before you re-take the module.


Delta: Are there any discounts or payment plans available for Delta?

Delta Modules can be paid per module or as a package: candidates who sign up to take all three Delta Modules with NILE pay a total of £3148, saving a total of £155. The package price is not available in conjunction with any other discount.
The Delta package can be paid in full prior to starting the first module, or according to the payment plan set out on our payment page. The payment plan must be agreed prior to starting the first module. 

Delta: How much tutor support can I expect for Modules 1 and 3?

Module 1 includes ‘tutor tasks’, which are submitted online and to which the Module Leader responds with corrections and feedback. In addition, there is also a revision package at the end of the course in the form of practice exam papers, and candidates receive detailed feedback on their performance. Module 3 includes 35 tasks, mostly designed for reflection, with answers and / or commentary provided online, but candidates may submit any of these tasks for feedback. In addition candidates are invited to submit drafts of each of the five sections of the extended assignment for feedback, as well as one final draft of the entire assignment.

Delta Module 1: How is the course organised and delivered?

The Module 1 course lasts for 12 weeks and consists of nine units delivered weekly with a full practice exam in Week 10 and the last two weeks of the course leading up to the exam dedicated to revision, including feedback on the practice exam. The course material covers the entire Delta syllabus, as well as providing a focus in each unit on the standard task-types used in the exam. Units are released on a weekly basis, and each unit includes a number of ‘Tutor Tasks’ to be uploaded onto the moodle platform for correction and feedback.


Delta Module 1: Where do I take the Module 1 exams?

At NILE if that is convenient; otherwise at your closest Cambridge exam centre. When you approach another centre to arrange to take the exam, please make it clear that you are NILE is enrolling you for the exam and you are asking them simply to host the exam for you. Once you have made such an arrangement, please inform NILE ( so that we can liaise with the centre. Please also be aware that other centres may charge a small administration fee.

Search for your nearest exam centre 

Delta Module 2: Why do you offer courses of two different lengths for Module 2?

We offer a 16-week and a 9-month Delta Module 2 course so that you can choose the one that best fits in with your work situation.  The 16-week courses will probably suit people who work part-time, while the 9-month course is designed for people working full-time.  Please discuss the best course option with us when you apply.

Delta Module 2: Who supervises and assesses the practical teaching assignments?

The diagnostic lesson and the first three assessed lessons are supervised and assessed by the Local Delta Tutor (LDT), supported by a NILE online tutor. The final assessed lesson is seen by an External Assessor (someone who is or has been a Delta tutor at another centre).

Delta Module 2:  How do I get a local Delta tutor?

We recommend you try to find a local Delta tutor yourself; ideally it would be someone who is already a Delta tutor who works with or near you and who you would be happy to work with. Alternatively, you can suggest someone who is an experienced teacher trainer who could follow NILE’s online Delta tutor training programme to train up to be your tutor.  Cambridge requirements for local Delta tutors are available on request. NILE will help to find you a local tutor if you have difficulty.

Delta Module 2:  Who pays for the local Delta tutor? 

The local Delta tutor’s fees are included in your course fees.

Delta Module 2:  Who organises the External Assessment?

NILE takes responsibility for organising the External Assessment, doing everything possible to ensure that you get an assessor for the date you want.

Delta Module 2: Who pays for the External Assessment?

All local costs and payment to the External assessor are covered by NILE and Cambridge. Any international transport costs need to be covered by the candidate. NILE will liaise with you to keep these costs as low as possible.

Delta Module 3:  How is the Module 3 course organised and delivered?

The Module 3 course consists of five units, corresponding to the five sections of the extended assignment. (See p. 71-73 of the Cambridge Delta Handbook). 

Unlike the Module 1 course, all the course material is available from the outset. At the end Units 1-4, a draft of the relevant section can be uploaded for tutor feedback, and a final draft of the whole assignment to be uploaded for tutor feedback at the end of Unit 5.

Delta Module 3: What are the specialisms for Module 3?

Cambridge offer a choice of 16 different specialisms for Module 3 (See p 68 of the Cambridge Delta Handbook  for the complete list of specialisms). In most cases, the choice will be clearly linked to a current teaching context, but in cases where specialisms may overlap or where the choice is not an obvious one, NILE will advise on the most appropriate option.

Please note that NILE does not offer the ELT Management alternative mode for Module 3.

Delta Module 3: Are there different Module 3 courses depending on the choice of specialism?

No – most of the work required for the Module 3 extended assignment depends on generic principles and procedures (relating to needs analysis, diagnostic assessment, course design, assessment of learning outcomes and course evaluation) which are applicable to any course regardless of the specialism involved. The NILE course for Module 3 includes supplementary units per specialism outlining key considerations for the particular area of teaching chosen.

Delta: How can I get more information about Delta at NILE?

Please see our information webinar from January 2017 or contact us.

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