In the end, I wrote a fake encyclopedia entry for “Old English language” and instructed them to correct all the mistakes and add any major omissions. The students moaned and carried on when I handed it out, but as I told them, the whole point of the class is for them to be able to read critically down the road. Nothing would make me happier than if, 10 years from now, they read some incorrect claim about the history of the language and said, “Wait a second, that’s not right.”