yea I had something similar happen to me twice during Highschool,
the first being a book that had a inccorrect listing for the D.R. 1 that Richthofen flew. Picture showed a Handly Page bomber, I of course spoke up and was told that I was wrong, began a debate which ended in checking 3 separate books and the internet. You can guess the outcome (I was successful).
The second was over MacArthur's escape from the Philippines, which this teacher said was made by (of all things) a HELICOPTER. So knowing it was made using PT boats and having watched a program on TV just 2 days prior told her so. My 2 arguments were, the army didn't have a helo in service at the time. and even IF they had one that could take them Where would they refuel? I was quickly told a helo was in the prototype stage at the time and that seemed to be the end of it. was in the 10th grade at the time and didn't feel like pressing my luck anymore that day.