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Join us for our biggest sale of the year!

Whether you are getting a head start on next year’s professional development, or stocking up for the year-end holidays, this is your best opportunity to invest in discounted iTDi courses and books in 2023. Buy during our sale and access these products at your convenience.

Shop before the sale ends!


The content of some of our most popular teaching skills courses in a self-access format.

Two price levels:

Personal learning: $59 USD $29.50 USD

Certified learning (evaluation + a certificate verifying 20 Professional Development Hours: $79 USD $39.50 USD


Register before November 30th and receive a discount for cohorts starting in March 2024.

140-hour certified TESOL course

$250 USD discount on your first installment if paid by December 31st.

30-hour introductory TESOL course

$50 USD discount if paid by December 31st.

Try before you buy

Experience one of the online lessons from the TESOL Certificate course + a live tutorial with our Certificate Director, Philip Shigeo Brown, and iTDi Founder, Steven Herder. It’s free.

Re-Envisioning EFL Education in Asia
Edited by Theron Muller, John Adamson, Steven Herder, and Philip Shigeo Brown

This third book by our editorial team moves the conversation from innovating in 2012 and exploring in 2014 to re-envisioning EFL teaching and learning through chapters that address contemporary 21st century issues. Here Asia comes into its own as a vibrant center of language teaching pedagogy and research. Further, how borders are envisioned and drawn is critiqued through chapters that, for example, explore multiethnic China and the Asian diaspora’s experiences when studying outside Asia. Its chapters speak to teachers and researchers interested in how to re-envision language teaching in their own contexts.

101 EFL Activities for Teaching University Students
Hall Houston

101 EFL Activities for Teaching University Students is filled with a variety of language learning activities that can be used throughout the semester. While designed with university teachers in mind, teachers of other subjects (and levels) will also find these activities useful in their classrooms. The activities in this book relate to three major themes: the context of the university environment (students learn by talking about their lives as university students), group dynamics – the stages of a group (the stages all students go through during a semester), and active learning (learning through actively using the course material, instead of listening to a professor deliver a lecture).

Small Changes in Teaching Big Results in Learning
John F. Fanselow

Small Changes in Teaching Big Results in Learning is a unique resource book aimed at both novice and experienced teachers of English as another language. It can be used in formal/informal teacher education groups or by individual teachers. As you master the activities and types of feedback introduced in this book, you will be able to move from teaching as a ritual to teaching as discovery. You will decrease the time you spend making lesson plans, quizzes and tests, looking for the ideal syllabus, and preparing worksheets and handouts and, as a result, you will have more time to analyze transcriptions and video clips of what you and your students are doing.

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