Last night, I was making cheese and crackers for Avery. I asked how many she wanted and she said, "three." (Well, she actually said, "free," but I will omit that fact in case Harvard ever finds this blog while reviewing her application.)
I set out three small crackers with cheese and said, "Now, if I had three crackers and took away one, how many would be left?" She said, "two." And I said, "If I had one cracker and added two more, how many would I have?" And she said, "three" (er, "free.") I was using the crackers as visuals so that she could understand what I was saying and said the words "plus" and "minus" to really drive the concept home. Then, I called Tim over to watch her do this simple math. We started to go through all the combinations of addition and subtraction again when Avery said, "Mommy...I'm hungry."