Accredited Online TESOL Certification Since 2003

Recognized by TESL Canada and ACTDEC UK.
Academically Equivalent to CELTA and Trinity CertTESOL


Internationally Recognized TESOL Courses:

The TEFL / TESOL courses offered by OnTESOL go beyond the theory and methodology of teaching English. All courses are assessed through practical lesson planning assignments that will prepare you to use the Communicative Language Teaching method anywhere in the world.

120-hour advanced TESOL certificate

Get certified to teach English abroad and get a credential that is also accepted in Canada, the United States, and other native English speaking countries.

This online 120-hour course offers the same level of training as a CELTA or Trinity CertTESOL course.

Accredited TESOL/TEFL Courses

TESL Canada Professional Standard 1

250-hour tesol diploma

The 250-hour TESOL Diploma is an extended version of the in-class Trinity CertTESOL that Coventry House International offers in Toronto.

Get the best training for a successful career with the TESOL Diploma.

Accredited TESOL/TEFL Courses

TESL Canada Professional Standard 2

Which Course is Right For Me?

The 120-hour Advanced TESOL Certificate course is perfect for people who want to take advanced training in an online format. This course offers the same level of training as a CELTA or Trinity CertTESOL course. It meets the requirements for international teaching jobs and offers comprehensive training in areas of grammar, phonology, classroom management, testing, and lesson planning.

The 250-hour TESOL Diploma course goes more in-depth on the grammar, phonology, and methodology topics. It is more comprehensive than CELTA or Trinity CertTESOL and provides a greater understanding of the impact of lesson planning on curriculum development. Many people who completed this course have pursued international opportunities in school management, academia, and publishing.

New to the World Of English Language Teaching?

Read our TESOL Certification Guide: Everything you need to know about types of TESOL courses, accreditations, and how to start your career in TESOL.


20-hour Specialist Certificate Courses

Most English language programs specialize in one of three areas: Young Learners, Business English, or IELTS preparation courses. The 20-hour Specialist certificate courses offered by OnTESOL will boost your resume and better prepare you for your teaching career.

teaching english online

TESOL course For K-12 Teachers

teaching english to young learners

Creative Speaking Activities for the ESL Classroom

teaching business english


why choose onTESOL?

1. Teach English Abroad Or At Home:

Our advanced online TESOL certificate courses are recognized abroad and in native-English speaking countries, so you can go abroad and have the credentials you need to teach at home. Take an internationally recognized TESOL certificate course with OnTESOL!

2. Double International Accreditation:

Our TESOL courses have been recognized by top international accrediting organizations such as TESL Canada and ACTDEC UK. These organizations have scrutinized the course material, teacher trainers, and advertising claims to ensure that all teacher-trainees receive the quality training that they deserve.

TESOL Accreditation

3. Professional Tutor Support:

An experienced and qualified teacher trainer is crucial in a TESOL certificate course. Our courses come with a professional and accredited teacher trainer who corrects the work, provides extensive feedback on each assignment and is available to answer questions. The Director of Studies supervises tutors, moderates assignments, and issues the final transcript and certificate. All our tutors have been approved by TESL Canada and ACTDEC UK.

4. Job Assistance Package

Get free recruitment, access to an international job board, a master list with more than 1,000 schools from around the world, and help with your resume and job interview when you take an accredited TESOL certificate course with OnTESOL! Learn more about our job assistance package.

5. Lesson Planning Skills: Why You Need Them to Get The Best Job

The level of lesson plan that you will learn to create in an advanced TESOL certificate course will put you above everyone else when applying for TESOL jobs. More importantly, your lesson planning skills will prepare you as a reflective and independent teacher, which means that you will have the skills to adapt the boring textbook and eventually develop a full curriculum with original lesson plans. This is a very valuable skill to have because it will help you enjoy your job and pursue a lucrative career in the field of Teaching English to Speakers of Other Languages (TESOL).

Reviews by Graduates

I have recently completed the 120-hour TESOL Certificate Course. I think this course is incredible and I would highly recommend it to anyone who wants to get into teaching English as a foreign or second language. Even though I’ve been teaching for sevel years, I have discovered so many useful techniques so I suggest that course even for those who think they are good at teaching English. My tutor, Aaron, is wonderful. He is a great guide who walked with me through the whole course and helped whenever I had problems and always got back to me in a timely manner. I want to thank OnTESOL for providing an unforgettable learning experience !

Yana Demtsun

I have enjoyed using my OnTESOL course for the past 7 years in life, in Cambodia and in Taiwan.

The assistance I received from the kind instructors that helped me to be creative and develop the way to teach. I would recommend this course to anyone that would like to know more about Teaching English as a Second Language and developing the skill of making lesson plans.

Thank you OnTESOL for your help all these years after completing my course. I feel you have done a lot to assist me in growing and succeed in teaching English.

Patrick Meir

Excellent online course. I was a little sceptical at first that the online course would not compare favourably with the classroom course but I was pleasantly surprised. I was able to use much of my new knowledge immediately. I took the 120-hour course plus the course for business English. I applied for ESL work in the business sector immediately after completing my OnTESOL course and received a favourable answer to all my requests, finally settling with the YMCA in Montreal. I never thought the course would be so helpful especially when it comes to lesson planning.

Michel Di Stefano

Country Specific TESOL Certification Guide for the Top Destinations

Request Brochure

Submit the form and we will send you a one-time email containing your Information Package.

Select the checkbox if you wish to receive the latest news and be the first to hear of any promotional discounts!