Danica McKellar

I love acting. Acting is a true love of mine, acting and math. Although they are both creative, they use very different sides of your brain. And I love both. Acting is my first love, and that's my main career, it really is.

Students never think it can be the teacher's fault and so I thought I was stupid. I was frustrated and would come home and cry because I couldn't do it. Then we got a new teacher who made math accessible. That made all the difference and I learned that it's how you present it that makes it scary or friendly.

If I'm serious, yes, I'd like to have done what Shakespeare did... to act and write. You learn so much from acting. One of our great writers, Alan Bennett, does both supremely well. When I write a story, I tend to speak it aloud as I'm writing it.

The idea of critical windows extends beyond just vision, of course: almost every system in the brain has a critical window when it needs to experience certain stimuli, or it won't get wired up properly. The most obvious example is language: if you don't learn a language early on, it's nigh impossible to become truly fluent.