Common Core Math For Parents For Dummies—a handbook for curious parents and others—is out now! Priced at under $10 on Amazon.
The real Frustrated Parent has endorsed it. I am not making this up.
The Talking Math with Your Kids Store
You can buy tiling turtles, pattern machines and my book Common Core Math For Parents For Dummies, (with more items coming soon) at the Talking Math with Your Kids Store