Well, right after he said that he started estimating how many pushpins he would need and told me we don't have enough. I think we'll have to use tape...

Here's a funny thing that happened with the flashcards. He wanted me to time him, and he did ten subtraction cards in 20 seconds. Right away he told me that was 2 seconds per card. I guess we can check 20/10=2 off our list smile