Online TESOL Diploma

Online TESOL DiplomaUNI-Prep's online TESOL Diploma course is an advanced teaching qualification. It is suitable for both individuals who have completed a TESOL / TEFL Certificate course, and for those who are looking to directly enrol in and complete a more advanced course. Graduates of our TESOL Diploma course are eligible to apply for more competitive positions and are typically offered higher pay. Upon graduation, you will receive both a 120-hour TESOL Certificate and a 250-hour TESOL Diploma. Since our TESOL Diploma course meets the requirements of both TESOL and TEFL, at the end of the course you will choose which certificate you will receive. 

The course includes extensive video lectures to supplement other course materials. It also includes a variety of activities that you can use in the classroom. In today's global economy, knowledge of the English language has become a core need for any professional. This has created a huge demand for English teachers abroad. Set yourself apart from other TESOL graduates through an advanced teaching qualification and enrol in the online TESOL Diploma course to increase your opportunities.



$800 $399 USD


250 Hours



Benefits of UNI-Prep's TESOL Diploma Course

  • You get a TESOL Certificate and a TESOL Diploma
  • All benefits of the TESOL Certificate program, plus
  • Choose TESOL or TEFL at the end of the program 
  • Letter of Recommendation
  • ✔ Job search assistance through our job board partner ESL Jobs Lounge
  • Eligible to receive higher pay and more opportunities
  • Additional grammar units and content
  • Diploma mailed internationally and e-mailed, free of charge
  • 99% course completion and pass rate
  • Accredited and internationally recognized

Course Content

General Teaching Subject Areas

Teaching ESL Subject Areas

Classroom Management

Spoken English


Techniques & Strategies

Classroom Testing


Proficiency Testing

Written English

Curriculum Planning

Reading in English

Lesson Planning

Writing in English

Teaching Activities

English Vocabulary

Teaching Beginners

Teaching Adults

Teaching Advanced Learners

Teaching Young Learners

Teaching TOEFL

Teaching IELTS

Teaching English Online

Teaching Business English

Advanced Teaching Concepts

Teaching Grammar


Frequently Asked Questions

What are the entry requirements to take this course?

The online TESOL / TEFL Diploma course is open to anyone over the age of 18 who has completed a high school diploma. We do not check your age or completion of high school during registration as we trust that you meet these requirements. You don't need to be an American/Canadian or in USA/Canada to take the course. We accept students that are located all around the world and citizens of every country. You also don't need to be a native English speaker, but you should be proficient in English. You don't need a degree and you don't need teaching experience. 


When can I start this course?

The course is online and there are no start and end dates. You can start the course at anytime. Once you register, you will receive a login and password to begin the course. You have a maximum of 1 year to complete the course.


How long will it take to complete the course?

This depends on you because you will be studying at your own pace. Most students complete the course in 4-6 weeks, but it depends on how often and quickly you will study. The course is 250-hours of study time and you have a maximum of 1 year to complete the course.


Course Registration

To register for the online TESOL Diploma course,
click the registration button.


$800 $399 USD


250 Hours



Videos About Our Online TESOL Diploma

Online TESOL Why UNI-Prep?

Why Should You Choose UNI-Prep to be Your TESOL Provider?

This short video gives some of the many reasons why UNI-Prep offers the best TESOL Certificate and Diploma programs.

TESOL Certificate and Diploma FAQs

FAQs Video

ŸThis video covers topics such as:

✔ What is the difference between the TESOL Certificate and Diploma?

✔ What are the entry requirements?

✔ Do I need to have teaching experience?


What People Are Saying

Leilanie Lee

Papara, Tahiti

“Uni-Prep Institute is first-rate. The TESOL Diploma program features excellent teachers who help you master teaching strategies and develop skills on your feet in the classroom. I have learned just how valuable this training is and I am delighted to recommend them."

Conan Lopez

Guadajalara, Mexico

“Taking the TESOL Certificate course with UNI-Prep was a wise decision. It's the cheapest program available and I could take it at my free time. I'm planning on also taking the TESOL Diploma with them. I definitely recommend this school to study at."

Accreditations & Affiliations

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online tesol diploma course, teaching diploma, advanced teacher training, accredited advanced teacher training, accredited tesol diploma course

250-hour TESOL, advanced teacher training program, tesol diploma course