TEFL/TESOL: is widely recognized international qualification for English teachers. You develop all of the potential you have in teaching English.. There are short tasks and in-depth activities throughout the course with 2 exams, one in grammar and one final exam.. You will receive the ISSO – International Student Services Org. and ILAC - International Language Academy of Canada certificate in TEFL/TESOL. A TEFL/TESOL certification is one of the best investments anyone who wishes to expand their own horizons can make. The ILAC –ISSO TEFL/TESOL certificate opens doors to English teaching positions worldwide. With its ever-growing demand for EFL education around the world, the place to begin your journey is in Colombia. .