(smooth music) - [Students] Math Mights! - Welcome back, second grade Math Mights. My name is Mrs. McCartney. I'm so excited that you've joined us for some math fun. Today, we're going to do a word ...

We know a lot about how babies learn to talk, and youngsters learn to read. Now scientists are unraveling the earliest building blocks of math — and what children know about numbers as they begin ...