I think you can work on your processing speed. Perhaps a child with a very low score on that will never achieve a 99% on that part of the test, but like with anything, it is a skill that can improve over time.
My point was simply- a Montessori does not emphasize at all speed. You go at your own pace. My son was at a fifth grade math level in first grade through the Montessori. However, I think our very good public school is challneging him much more for other critical subjects like reading and writing. And it's forced him to get better with speed and finishing tasks on time, which the Montessori never emphasized.
The transition from the Montessori has gone very, very well. Actually, this has been a terrific year for him. We are waiting for the GT program that is full-time and starts in 4th grade. He got a 138 on the WISC and I'm assuming he will get into it.
