Whenever you “recycle” a plastic water bottle instead of throwing it out, you’re helping our planet by letting that plastic be re-used, so we don’t have to make it from scratch again. But it gets even better than that in Istanbul, Turkey, where one company has created a way to help the environment and stray cats and dogs in the city.
100 is a great number, and it’s even better if it’s your age — and you’re a math teacher. Madeline Scotto just turned 100 years old last week, and is still working 3 days a week as a math-team coach. It just goes to show that it’s fun to play with numbers at any age.
There are about 320 million Americans – right now, at least. But how many have we ever had? This isn’t the easiest number to figure out. In 2011 one group did just that, though. And the numbers may shock you!
Yes, you’re seeing that picture right: it shows a man sitting inside a fuzzy, claw-shaped slipper. The slipper was a big accident, made wrong when Tom Boddingham tried to order one slipper in a different size from the other. We doubt he wanted it to be that much bigger, but it definitely makes a nice sleeping bag!
Back when human beings lived in caves, life wasn’t anything like it is now. Cavemen woke up, hunted animals all day, went to sleep, and the next day they started all over, probably without taking a bath. They definitely didn’t have our cool tools, toys and gadgets. But they did make art!
We’re loving this map of Crayola crayon colors, showing how Crayola has added more and more shades over the years. Back when the company started in 1903 as Binney & Smith, there were just 8 crayon shades. Since then, the number of colors has grown a lot, making coloring more fun!
When we’re in a hurry, we hate having to stop and wait for a red light, or for that sign with the little red man. People in a rush sometimes just ignore that guy and try to run across before cars drive through, which is dangerous. So some people in Lisbon, Portugal wondered if pedestrians (people on foot) would stop if the little red man moved around and made waiting fun.
Of all the things you can buy, buying trillions of dollars that can’t be spent on anything might be the weirdest. But sure enough, on Amazon and other sites you can buy old money from Zimbabwe, a trillion dollars at a time. Every country has its own unit of money, called currency (dollars in the US, pounds in Great Britain, and so on).
When we count out money to pay for something, usually we don’t study it very carefully – we just add it up. But money has some cool secrets. Click “Read More” to find out about them, and do the money math!
If you’ve ever slept over at a friend’s house, you know how hard it is to sleep at these things. It’s just too much fun to be with people you don’t normally see at that time. And even though you’ll fall asleep really late, you might wake up early the next morning anyway, since you’re used to it. Click “Read More” to some sleepover bedtime math!