Special class for Japanese, Australians, and more
 

I was asked to plan a special lesson next week for my students to participate in together with visiting East Asian students. This morning I learned that quite a few of the visitors are actually from Australia and New Zealand (do we call this East Asia?). So I will have my 18 students, whose English level is low, 6 students who are presumably native speakers, and 4 students from other East Asian countries, whose English level is unknown. Has anyone done something like this before, or have any ideas of what might work well?

(On the following day the visiting students will attend one of my regular English classes, which I will not change -- so on this day I really want to do something different).

Thanks so much for any ideas!