Greater than/less than/equal to was one of the concepts that he picked up very, very early on. I could see his estimation skills being off.
I am wondering if he just rushed through some things and made some calculation errors. He told us the day he took this test that he "got things mostly correct but then we he went back he missed a couple of problems but told the teacher I know what the answer is."
Thanks for the reference. For the second grade number sense it's possible he doesn't know some of those terms.
JB
