Perhaps this goes back to the reason why ALL of these age and grade equivalents should be taken with a huge grain of salt.
Aren't these equivalencies just saying that a child with the given IQ has the same capability as the AVERAGE child of the age or grade stated? It seems to me that that is a far different thing from saying that the child should be accelerated to that grade or even doing work for that grade level. After all, how many of us would be happy if our child were operating at an average level for a particular grade in an average school? And we're talking national averages, not just in a upscale communities with "good" schools.
