re: What's the dumbest thing a teacher's ever 'taught' you?

I once had a teacher tell us that there were two acceptable spellings for congratulations, one of which being congradulations...but it was only acceptable for graduation ceremonies.

Over time I thought I just dreamed it up, but eventually confirmed with an ex classmate.

The worst part is, I was a grown man before I figured out she was incorrect. Thank God it isn't a word you write out many times.