Abstract
It is very important for the students at National College of Technology to be able to explain various things concerning to their specialities in English, because they will surely have needs to communicate with technical experts from various countries in this internationalizing age. For this matter, we should give them some practice in our class as a preparation for their future needs. It is one such way to make them explain in simple English general things around them. While they learn how to give explanation or definition on such things by themselves, they can get the basis for acquiring vocabulary and expressions needed to improve their communicative competence with foreign technical experts in the future.