New Math Materials

We've begun using some new math materials lately. This
is a math balance (from Right Start Math). It's really neat
as it helps Logan check his math facts. In the first picture
he's adding 7+2. In the second two pictures he has to figure
out the difference. With 10 on one side and 5 on the other,
what number should he add to make them equal and the
scale balance?

It's a great math tool! Here's the link if you're interested
(it came with our math curriculum, but is $20 if you buy
it separately):

http://www.activitiesforlearning.com/index.asp?PageAction=VIEWPROD&ProdID=53