My thoughts and prayers are with those in Boston. I have family in Boston and am so thankful they are well. Two of them were near the blast, but left the area before the explosion.
A few of my firsties are struggling with adding 9's. I thought it would be good for them to work on them with adding 10's. When they know their addition facts for adding 10, most of them can quickly figure out one less for the plus 9 facts. I created a math card game for them to practice. It has cute ladybugs and butterflies. They turn over a number card when they draw a matching addition problem. The first person to have all their number cards face down wins the game!