As a kid (and up until I was about 11) I believed that teachers were not actually allowed to have kids of their own. No idea where this came from or why it lasted so long. (I'm now a teacher!!)
A childhood belief about teachers

others believed things like this
- I thought that 1983 went on for 3 years - had to ask my sister who decided how long a year lasted.— Sally
- I believed that our teachers lived at school. They were teachers--they had no reason to leave :)(Anon
- I used to believe that the teacher's lounge was where the teachers went to make out.— Julia
- Up until I was about seven, I thought soda pop was alcoholic and that's why kids weren't allowed it.Anon
- I used to believe that teachers built missiles when they went to the teachers lounge.— HOLLIS
- Until I was around 9 or 10 I believed that a woman was only allowed to marry a man who was older than her. — Rose