Twenty years ago, Texas Instruments released the TI-83 graphing calculator, a stupidly expensive piece of old technology that most high schools still require their juniors and seniors buy for around $100. Why? Because. That's why. From Mic.com:
Pearson textbooks feature illustrations of TI-series calculators alongside chapters so students can use their TI calculator in conjunction with the lesson plan. The calculators also have a significant learning curve, and moving students over to new technology is a risky proposition when success in the classroom is so tied to the technology being used.
TI calculators have been a constant, essential staple in the slow-moving public education sector. Students and teachers are so used to generations of students learning the familiar button combos and menu options that TI provides a computer program that perfectly resembles the button layout of the TI-83.
However, even if teachers wanted to be bold and bring in better technology, they would end up right back at square one because of that infamous force in American education: standardized testing.
College Board and other companies that administer the country's standardized tests have approved lists of calculators. TI-series devices are ubiquitous — mobile apps are nowhere to be found.
"I'm actually at the point now where when I do parent conferences, I tell the parents it's in their students' best interest to buy one, because the device will become necessary," Bob Lochel, a math teacher in Hatboro, Pennsylvania, told Mic. "But you feel dirty, because you're telling parents they need to buy a device, and I know I can teach without it."
"Let's be bold -- let's join the rest of the world and go metric," said Democratic presidential candidate Lincoln Chafee when he announced his bid for the Oval Office. CNN interviews John Bemelmans Marciano, author of Whatever Happened to the Metric System?, about why the US is the only industrialized nation not to use the metric system in business, or most other fields. (Above, U.S. Office of Education public service announcement from 1978.) From CNN:
"People say the metric system makes sense," Marciano says, "But in nature we don't think about dividing things by 10, do we? We think of halves and feet and thirds."
Acres, for instance, were based on the amount of land a man could plow in a day.
"Throughout history we have measured things by ourselves," Marciano says. "We are really losing something with metric."
And another thing: People think the metric system has something to do with science. It doesn't, Marciano says, except that it is used in science and every scientist will probably put forth a convincing argument for why it's silly not to be metric.
"That's the biggest misconception," Marciano says. "The metric system has everything to do with capitalism. It's all about a selling system."
"Refusing to Give an Inch" (CNN)
If you like math, puzzles or winter sports, you need to play Sinerider, a sledding game where you transform the slope with math equations. Read the rest
Dev Gualtieri's newly published Secret Codes & Number Games: Cryptographic Projects & Number Games for Children Ages 5-16 is a thoughtfully designed introduction to crypto for kids. Read the rest
Vi Hart and Nicky Case created a brilliant "playable post" that challenges you to arrange two groups of polygons to make them "happy" by ensuring that no more than 2/3 of their neighbors are different. Read the rest