Is it true a elementary school could knows the IQ of all the students?

Our principal said the school has several classmates who have 140 IQ. I said, "how do you know that"? She resonded, "by the IOWA s". I said how can that be when it's not above level testing? She responded we do "X testing" (I don't remember the name)

If this is true. Why did they do an IQ on DS?

Last edited by onthegomom; 01/28/10 11:42 AM.