Talking with another mother at the Jesuit school where DD is now going. Her husband has a prepping service in NYC, for SBV, ERB and OLSAT.
The daughter got 168 sum of raw scores for SBV, DD got 149 last year (though I wonder about the psychologist -- didn't have a choice). Anyway, the mother tells me that the teachers consider her daughter one of the smartest in the class. While DD was given math problems to see what she could do.
We have had another assessment and DD5's IQ is estimated around 150-155. At this age, it is still transient but I do notice more motivation, internal pushing for challenges etc, which I did not see at 4, just high curiousity.
So I am not sure how much you can prep for SBV, but clearly this girl got high scores as a result.
A friend owns one of the largest psycholgical assessment firms in NYC and he said that until around 7th grade, IQ can vary 20/30 points either way from the testing at age 4-5. So I am trying not to figure out where DD ends up, but I thought the story interesting.
On another note, DD is not staying at the school. Great for the above average kid, not the really smart. She is cooperating more this year, and has a final assessment at the Special Music School in 12 days. Please wish me luck. She is having mixed feelings (perfectionist, leaving her school etc. ) need the luck. We did hear that half of the kids go on to Styvescant High school from SMS. From Styvescant you get into any college, Harvard, Yale etc. The curriculum is great, particularly for highly gifted kids.
I feel like education for DD is a constant and ongoing project...maybe some of you get that

Have a good day.
Ren