The assignment was to write a review and commentary on a newspaper article. (I handed out the articles, so I had some measure of control over the content.) The article that "Nguyen" had received was about the hunting of geese.
His commentary included something to the effect of the following: "If it is for meat, it is OK. But I do not believe people should hunt geese just for their fur and feathers."
The oddness didn't really hit me until my red pen was almost done writing this sentence: "Geese don't have fur."
We teach so very much in ESL classes, but at that time I didn't expect to have to include any aspect (however minimal) of bird biology.
Now -- nearly 10 years later -- I know better. Lots and lots better. ESL teachers teach much more than grammar, vocabulary and sentence structure. We teach the world about the world. And just how does one prepare to do that??