When I was in the 1st or 2nd grade, the nun told the class that if we wore our boots in the classroom it would harm our eyesight. I think I was an adult for a long time before I came to suspect it wasn't true. (Maybe it is.)
A childhood belief about teachers

others believed things like this
- I believed that the word optimistic was something to do with opticians and being happy with your eyesight.Anon
- I used to think that they only sold car boots at boot fairs! — Di
- I used to belief that the Muslim women who wore their garment wore it because they were bald.Anon
- I used to think that if you ate cat food you would die. I found out it wasn't true
— Bob#4 - i used to believe that the hard toe caps on rugby boots were made from giant ants found in the amazon!— eryll
- I used to believe that killer bees would take over the world by the time I was an adult.— Kristy O.