It's trivial to be 2-3 grades ahead in reading, but unusual to be 2-3 grades ahead in math. Tons of K or 1st grade kids can read Droon or Rainbow fairy books, which are grade 3/4. I suspect the kids who are 2-3 grades ahead in math are significantly more than the PG cutoff, while kids reading a couple of grades ahead are much closer to the mean.

Last edited by Tallulah; 12/20/14 09:40 PM.