Thanks to all for the replies!
Grinity, you're amazing. I follow the math in both examples but fall apart when it comes to assuming a higher IQ average for the district. Hahaha! Guess I now know where my own IQ lies, lol.
I believe our district has between 550 and 600 2nd graders (public & private schools included), vying for no more than 15 spots, I imagine. I say this because the self-contained program ("gifted" became "self-contained" somewhere in the past decade) is multi-age, I think, with a single 3rd/4th-grade classroom and then a separate 5th-grade classroom. It may be that there are more 5th grade students because of the district's policy allowing students to "test in" at 3rd, 4th or 5th grade (i.e., a child not selected in 3rd may be reassessed and selected later).
That said, I suspect the average IQ is higher than 100. It's a mixed demographic to some extent, but the majority is fairly homogenous -- well-educated, professional and economically upscale. Some of the 2nd graders (maybe 15-20) who may or may not try to test into the public self-contained program currently attend a private school with a 125 IQ admission cut-off.
Long way of saying... the math is beyond me.
But I see what you're saying, and it makes total sense. I also have a call in to see what more I can find out. I really appreciate all the input here.
