Earlier this month, I showed you how to convert currencies, when given the exchange rate. When you’re not using an online calculator, that process involves proportions, which are pretty simple to use, but do require a little figuring on paper. This same
Kids in the Car: Keep ’em busy with math
Whether you’re flying across country or crammed in the mini-van for a trip to Grandma’s house, keeping a kid occupied on a long trip may mean you need a vacation at the end of it. And sure, we can plug
Ah, Ohh! Math and fireworks
Here in the states, today is Independence Day — the 236 anniversary of the signing of the Declaration of Independence. (Yes, I subtracted 1776 from 2012.) Most of us are taking the day off, but there is one industry that
Feeling the Burn: The math of SPF
It’s the last post of June, but we have a lot more summer to go. That means a lot more opportunities to enjoy the outdoors — and expose ourselves to damaging UV rays. Not only is a burn uncomfortable (or
Garden Geometry: A guest post from the Outlaw Garden
My thumb isn’t even remotely green. The only plants I have any success with are those that can sustain a tremendous amount of neglect — like hydrangea, hostas and lariope. So I asked fellow write and founder of Outlaw Garden, Cristina Santiestevan to
How Hot Is It? Calculating the heat index
Lordy, it’s hot. And the heat makes me cranky. When I saw that the temps were creeping up to the 90s and beyond this week, I vowed to stay in the airconditioning. Trust me; it’s best for everyone involved. So
Preserving the Harvest: Canning with Math
As a child, the only time I ever heard my mother use the f-word was in reference to green beans. It was the summer that my father put in a huge garden at our house, and she was sick of
Counting Pages: Make a memory book
Whether for graduation or summer camp or a great trip, a memory book or journal can be a nice way to remember a special time. And since I’m currently addicted to Pinterest, I’ve been browsing tutorials–from simple booklets to fancy,
Hittin’ the Trail: Taking the math in stride
I grew up a few miles from the Appalachian Trail in Southwest Virginia and my grandparents lived in the Shenandoah Valley, near Big Meadows a popular stop-off for trail hikers. While I’ve never had any inclination to take the entire trail from Georgia to Maine, I have
Getting an Education in Student Loans
How about these scary statistics: 1. In the U.S. student loan debt is huge. Last year alone, students took out $117 billion in federal student loans. The Consumer Financial Protection Bureau estimates that the total U.S. debt has now exceeded $1 trillion. And
Ten Things Parents Wish Math Teachers Knew
We’ve gotten advice from math teachers to parents and from students to math teachers. But parents can also play a big role in how their kids learn math and succeed in school. So, I’ve decided to given them a chance to share their
Math Tricks: Good or bad?
When I do interviews or speak to groups about math, one of the things I worry about is that people will expect me to do math tricks. And I worry about this for good reason. I can’t multiply two three-digit