www.lexile.com is supposed to be the place to go for the 'real info', but the lexile scores overlap various grades a lot.
I am not even sure if a lexile level is the same as a lexile score, which I think we got for ds9.
I had this same question, I wanted a 'grade level' to match to the number I was seeing, but couldn't quite figure it out, I decided it was probably the one where my ds number was mostly in the middle of the range. (8th, but then this seemed way too high...ack)

Here is the link where I found the grade : lexile 'range' chart...
http://www.lexile.com/DesktopDefault.aspx?view=ed&tabindex=6&tabid=18

ps, ds' was just shy of 1000, iirc, so I'm not sure where 10-12 would come in, but perhaps those were the grade level equivalents? Did you see any 3 or 4 digit number?

Last edited by chris1234; 09/17/09 02:31 PM.