yikes. This is quite frightening. DS5 is starting first grade today. Lately he has been plotting x and y axis, doing exponents, started adding binary numbers, etc. He is easily comfortable with probably up to 10 digit adding/subtracting. He probably could use a little practice in long division and some triple digit multiplication...but he can still do it. His school this year only goes up to 2nd grade. I am worried then will stick him in the 2nd grade math for a "challenge" I would much rather them just give him some independent stuff for math, and read independently for reading and have him answer questions or something. We will see.