I think you're preaching to the choir here! whistle

I agree, there is huge variation in development from one kid to another and even in the development of different skills by a given child.

But the way the schools are set up you would think that kids are clones! I don't think anyone is well-served by our current educational system. We have the means/technology/understanding/etc. to start designing individualized educational plans for each kid. That's what we should be aiming for.