Up until I was in the second grade I understood multiple choice questions that asked "which number is bigger?" to mean which digits were larger. I would measure them with a ruler and circle the 'biggest' one. My 2nd grade teacher saw me doing this and asked why. When I explained she corrected me, saying they wanted the number that meant 'more'. DUH. Well hey, this sure simplified these tests!
A childhood belief about classes

others believed things like this
- I used to believe that rounding a number meant drawing a circle around it.Anon
- i used to belive that 100 was the biggest number in the world "i got at least a hundred marbles."— dan harris
- when i was little i believed that your social security number was the number you were born on the earth — christine
- A[n] nth grade teacher only had to finish the nth grade when he or she was in school.— MD Caruso
- I learned in the first grade that the Sun was a star just like all the other stars, only it was MUCH bigger.— Geoff
- When a "mean girl" in early grade school asked me if I was a virgin I answered "no I am catholic."— Hilary