Second, find out how much English they know already, and teach to their level. If you have different levels of English proficiency, get the more knowledgeable students to help with the less proficient. Again, concentrate on what is functional for them. Teach grammar through useful stock sentences and phrases they can memorize.

 

Third, be sure you teach some travel English. If they are going to trade fairs, they need this.

 

You may also want to check out some translation apps for smartphones or tablets. (They probably already own one or more.) In a pinch, they could look up an unfamiliar word. I hope this helps.