Debbie,
Has the teacher asked the kids to count as high as they can? When my son was 5yo in 1st, his teacher asked each child to count as high as possible with their parent/s for homework.
After 100, I let my son count by 5s, then 10s. He mistakenly said that 2,000 came after 1,090 (He counted as high as 5,000 something before, but I was happy he made the mistake that night). He appartently counted higher than the other kids and it demonstrated his math readiness to his teacher.
It seems like a very simple exercise, but it helped show his strenght.
