I used to believe when teachers asked you to 'double-space' your essay, they literally mean to put two spaces between each word.
I used to get really frustrated that my word processor only double-spaced LINES and not WORDS and I would do it manually! Strangely, none of my teachers actually noticed the lines weren't double-spaced!! Talk about misleading!
A childhood belief about classes

others believed things like this
- I used to believe that the solid double yellow lines on highways were the motorcycle lane.— jeech
- I believed that the gap between the double yellow lines in the road was a special lane for motorcycles.— Joel
- Some sport cars have a double exhaust. I wondered why. Why would people want to pollute twice as much?— F*ck the environment?
- I believed that our teachers lived at school. They were teachers--they had no reason to leave :)(Anon
- I used to believe that boys couldn't be teachers because they weren't smart enough. — Azz
- I used to believe that teachers built missiles when they went to the teachers lounge.— HOLLIS