World Renowned TESOL / TEFL
Online Certification Courses

Internationally Accredited by:

Since 2003, our internationally recognized TESOL / TEFL certification courses have helped thousands of people pursue a meaningful career in the field of English Language Teaching.

Get certified to teach English worldwide with OnTESOL!

Recognized by TESL Canada Since 2003

Accredited TEFL / TESL / TESOL Certification Courses with Job Assistance and Tutor Support

120-hour Advanced TESOL Certificate

Online Course Accredited by TESL Canada at their
Professional Level 1 and ACTDEC at Level 3

Accredited TESOL/TEFL Courses

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.

250-hour TESOL Diploma

Online Course Accredited by TESL Canada at their Professional Level 2 and ACTDEC at Level 5

Accredited TESOL/TEFL Courses

Recommended for experienced ESL teachers looking to dive deep into TESOL methodology. Pursue career advancement opportunities worldwide.

This online 250-hour course offers more comprehensive training than the standard TESOL, TEFL, or CELTA course.

What is TESL Canada?

Find out how you can use your TESL Canada certification to teach English in Canada, in other Native English speaking countries, or go abroad with an internationally recognized credential.

TESOL Certification Guide

New to the World Of English Language Teaching?
Read our TESOL Certification Guide: Everything you need to know about types of courses, accreditations, and how to start your career in TESOL.

How Do I Choose a Quality TEFL / TESL / TESOL Certification Course?

A TESOL / TEFL / TESL course should teach you the most common methodologies and lesson planning formats to develop your capacity to adapt to different teaching materials and groups of learners. 

Knowing how to supplement the textbook with communicative activities and authentic material (Ei: songs, movies, news stories, podcasts, and other media) is a very important skill that you must have as an ESL teacher. Whether you are planning to teach English abroad, in an English immersion program at home, or teach English online, the textbook is often outdated and boring. In some schools, there isn’t even a textbook teachers can follow! For this reason, it is recommended to take a TESOL / TEFL / TESL certification course with a strong focus on lesson planning and the Communicative Language Teaching method.

How Does OnTESOL Offer Quality Training?

Our mission is to provide trainees the skills they need to become reflective and independent teachers. After completing your advanced TESOL course with OnTESOL, you will be able to create fun and effective lesson plans using authentic materials, integrated skills activities, role-playing, simulations, drama, storytelling, debating techniques, presentations, and many more CLT strategies and techniques.

Our advanced TESOL courses also include a comprehensive grammar and phonology module that will test your knowledge and serve you as a reference throughout your teaching career.


Teaching Abroad Vs. Teaching Immersion Programs at Home

Teaching abroad is a great way to travel the world while doing a job that makes a difference in the lives of many people.

Most people teach English abroad for a year or two, but there are plenty of highly paid job opportunities in native-English countries, so there are thousands of teachers who continue their TESOL career at home or keep traveling around the world.

The advanced TESOL courses offered by OnTESOL provide great flexibility to native-English speakers from Canada, USA, UK, Ireland, Australia, New Zealand, and South Africa who want a credential that is accepted abroad and also at home.

Why Choose OnTESOL?

OnTESOL was started in 2003 by Coventry House International to offer advanced training in an online format. Over the years, our online TESOL courses have been recognized by TESL Canada, TESL Ontario, and ACTDEC UK. Our syllabus is based on the same Trinity CertTESOL syllabus offered by Coventry House International in Toronto.


Reviews by OnTESOL Graduates

I had a very accommodating tutor named Danielle. Though we didn’t get to see other, I felt very comfortable with her. I value and really appreciate her efforts and time on checking my assignments, especially when I was having trouble in making a lesson plan. I learned so much with my tutor. The ideas that she shared had been a great help in my class. Thank you for the great experience OnTESOL!

Teresa Legria – Teaching English in South Korea

Even after completing a Bachelor of Education, Master’s Degree in Educational Psychology with a thesis on English Language Learner Achievement, two years teaching in South Korean international schools and five years teaching in Canadian public secondary schools, which includes international programming, I found OnTESOL’s program incredibly useful, relevant, theoretically sound and pedagogically inspiring. Not only is this program fundamental for those who wish to teach abroad, but it is also practical and helpful for teachers working with international students who need greater insight into linguistic development, language learner needs and adapted teaching strategies.

Geordy Reid – Teaching English in Canada

The course was really helpful and beneficial. I have been an ESL for 3 years but I still learned a lot and I am now a much more effective teacher. I finished the course feeling more confident because I am better equipped after in taking the 120-hour TESOL certificate course with OnTESOL. Furthermore, the tutors are great. They encourage you to ask questions and they also provide lots of comments and feedback. They are really committed in your learning. Choosing OnTESOL is a very good decision! 

Michelle Chavez – Teaching English in Thailand




Teaching experience is not required to teach English abroad. Teaching experience may be required in native-English speaking countries, the Middle East, and Hong Kong, where teachers earn up to $70,000/year plus benefits.


You don’t need to speak the local language to teach English abroad, but you should take advantage of your TESL experience to learn a new language for your own personal development. The English-only policy prevails in most programs and schools want certified teachers who know how to use the Communicative Approach. Our TESOL courses will prepare you for the job.


Our online TEFL / TESOL certification courses are recognized by TESL Canada and ACTDEC UK. These accrediting organizations have approved our course material, teacher trainers, and advertising claims.


Most course providers offer introductory TESOL courses for people who just want to teach English abroad and travel. Even CELTA is an introductory program for entry-level teachers. Our goal is to raise the standards of the industry by providing professional teacher training programs that are accredited and affordable. Learn more about us


CELTA is an entry-level 120-hour TESL / TEFL / TESOL certification course that includes a Practicum module. OnTESOL offers advanced online TESOL courses with an optional Practicum module that is offered separately. Our 120-hour Advanced TESOL Certificate is academically equivalent to CELTA. Our 250-hour TESOL Diploma is more comprehensive than the CELTA certification course. Graduates who wish to gain supervised teaching experience can take the 20-hour Practicum module anywhere in the world.


All our TESOL courses come with professional tutor support! An experienced and accredited teacher trainer will assist you throughout the program and provide you with extensive feedback on every assignment.


In most countries, the minimum TEFL / TESOL certification requirement is 100 hours. If your goal is to teach English abroad, you can get an entry-level job anywhere in the world with an online TESOL or TEFL course. If you want to teach English in a native-speaking country, you need to complete a 20-hour Practicum module after the online course. The Practicum module is also recommended for certain teach abroad programs in Hong Kong and the Middle East. OnTESOL graduates can complete an optional Practicum module after completing any of our advanced TESOL certificate courses.


You can take the Practicum module anywhere in the world after completing any of our advanced TESOL courses (The Practicum is not available for TEFL certificate graduates). The Practicum must take place with adult students, as per TESL Canada requirements. Graduates are required to find a qualified supervising teacher and OnTESOL will provide the guidelines after we approve the supervising teacher.


Our graduates are teaching English in the most reputable programs in the world! Their top 10 picks are:

Canada: Language schools and universities.

Hong Kong: Language Schools, NET’s Program, Business English programs.

South Korea: EPIK and private schools.

United Arab Emirates: ADEC, ADVETI, and international schools.

Germany: Language schools and Business English programs.

Japan: JET Programme, Interac, Gaba, Conversational schools.

China: Universities, English First, and other language schools.

Thailand:  Language schools and public schools.

Turkey: Language schools and international schools.

Italy: Business English programs and language schools.

Spain: Business English programs and language schools.


TEFLTESOL, and TESL are acronyms that refer to the same industry. 

TEFL: Teaching English as a Foreign Language. The TEFL courses offered by OnTESOL were developed for people who want core training and certification to teach English abroad during their gap-year

TESOL: Teaching English to Speakers of Other Languages. Our advanced TESOL courses were developed for people who want to pursue a professional international career.

TESL: Teaching English as a Second Language. In Canada, accrediting and professional groups carry the TESL designation (ei: TESL Canada, TESL Ontario, ATESL, and TESL Toronto). Our advanced TESOL courses are recognized by TESL Canada.

Ready to Become TESOL Certified?

Our accredited TESOL programs will give you the skills and knowledge you need.