This is 100% inaccurate. Any half decent TEFL course will teach you that you are doing a disservice to your students every time you speak to them in their native language. It is possible to teach complete beginners here without uttering a word of Spanish. I've done it frequently. It is challenging, but it is absolutely possible.va2ba said:And yes, you must have a good foundation in Spanish unless you only plan on teaching advanced students.
Don said:I think this depends on learning styles. I was taught Spanish in both Spanish and English, starting around 13 years of age. I speak Spanish nearly flawlessly. Many Argentines initially think I am Argentine; Chileans/Colombians/Ecuadorians/etc., just assume that I am; and foreigners from non Spanish-speaking countries are confused as heck when I tell them I'm not from here. I'm not trying to gloat, but I am just saying that having concepts and grammar explained to me in my native language (as well as immersion) has really helped me to speak the language the way I do.