TEFL Institute TEFL Institute is dedicated to excellence in teaching English abroad. We believe everyone can have the opportunity to be professionally trained to be an excellent English teacher and have the opportunity to live abroad. We pride ourselves in offering guidance and advice to all new teachers to the exciting world of teaching English abroad and pursuing a once in a lifetime opportunity. TEFL Institute is the leader in professional TEFL certifications worldwide with headquarters in Chicago, IL. Our staff have lived and worked in over 70 countries worldwide and offer each student personal and professional advice on this new adventure.