Opinion: Math scares your child's elementary school teacher — and that should frighten you
Many elementary school teachers are anxious about teaching math, and studies show their students learn less from them. Math should be taught by specialists starting in kindergarten.
I can’t see this type of proposal going over well in the educational communities. But it does provoke a valid thought, what level of subject matter expertise should we require from our teachers?
“Losing the responsibility to teach math might be an affront to elementary teachers, but many simply don’t understand math well enough to teach it. That’s because their teachers didn’t understand math, and it’s past time to interrupt this cycle.”Posted on 2019-11-30T20:40:11+0000
Lessons learned building an ML trading system that turned $5k into $200k
One of my recent side projects was building an automated trading system for the crypto markets. To be fair, I probably spent more time on this than on my full-time job, so calling it a side project may not be completely accurate. The internet is full of people ready to teach you about trading. Most....
This was a really good read going into technical depth about building trading systems for crypto-currencies, and some translatable lessons on how to do this for traditional markets.
Goes into a lot of detail behind what you need for an "ML" system and how just a new model alone doesn't cut it. My main takeaway from this is that a lot of the new fancy ML systems fail because people try to use it as a substitute for deep domain expertise -- when, in fact, you need the expertise in order to make a good model in the first place.
"You may be disappointed that this post was more focused on problems than solutions. But that's for a reason. There are no universal solutions to complex problems that work in all cases. What's important is to fully understand the facets of a problem, and then make the reasonable decision specific to your context."Posted on 2019-11-29T20:48:17+0000
The Great American Eye-Exam Scam
Why is it so difficult to get a new pair of glasses or contacts in this country? It’s easier pretty much everywhere else.
"In every other country in which I’ve lived ... it is far easier to buy glasses or contact lenses than it is here ...
So why does the United States require people who want to purchase something as simple as a curved piece of plastic to get a prescription, preceded by a costly medical exam?"
I've always wondered the same thing ever since I moved to the US. The article does investigate a bit of the "why" behind this but it's not satisfying. I understand wanting a forcing function for some screenings but this just has so many downsides like people avoiding tests altogether.Posted on 2019-11-28T07:13:19+0000
Mr. Rogers Had a Simple Set of Rules for Talking to Children
The TV legend possessed an extraordinary understanding of how kids make sense of language.
The principles highlighted in this article are so thoughtful and are worth reading. Too long to quote here though.
When looking for a single quote to highlight I had a hard time picking just one - seriously, go read the whole thing.
"Rogers brought this level of care and attention not just to granular details and phrasings, but the bigger messages his show would send. Hedda Sharapan, one of the staff members at Fred Rogers’s production company, Family Communications, Inc., recalls Rogers once halted taping of a show when a cast member told the puppet Henrietta Pussycat not to cry; he interrupted shooting to make it clear that his show would never suggest to children that they not cry."Posted on 2019-11-10T22:45:47+0000
Surviving as an Old in the Tech World | Backchannel
Companies can thrive without shunning employees of a certain age. Here’s how.
Interesting take on work in the valley and in the tech industry, ageism, and how to make offices and work environments more inclusive for everyone - not just older folk.
“I’ve thought about that brief exchange a lot since—and it was in no way particular to Google. Age awareness is a funny thing. I’m 66 now and I don’t dye my hair or hide my age. But this confidence comes in part from working in tech businesses for many years, among—and increasingly for—people 10, 20, and even 30 years younger than me. I haven’t always liked it, but it’s the norm. I’m used to it. So used to it, in fact, that I’m quite skeptical of legacy companies that value hierarchy and old-school protocols above all. (You know the ones: They live by “We’ve always done it this way.”) I wouldn’t want to work in a place where management is close to my age without a gold-plated guarantee they share the “Let’s try it and see” outlook of younger companies.”Posted on 2019-11-10T22:01:26+0000
A Lost Secret: How To Get Kids To Pay Attention
Maya kids do better on tests measuring attention, researchers say it's because these kids have something that many American kids have lost.
I wonder when this study will hopefully get turned into practice so kids can get more autonomy and room to roam and explore.
It does seem like something which has gone by the wayside lately.
“Right away, I realize what these kids have that many American kids miss out on: an enormous amount of freedom. The freedom to largely choose what they do, where they go, whom they do it with. That means, they also have the freedom to control what they pay attention to.
Even the little 4-year-old has the freedom to leave the house by herself, her mother says.”Posted on 2019-11-10T21:46:15+0000
A Classical Math Problem Gets Pulled Into the Modern World | Quanta Magazine
A century ago, the great mathematician David Hilbert posed a probing question in pure mathematics. A recent advance in optimization theory is bringing Hilbert’s
Interesting read that covers some amount of math and modern robotics/ simulations.
Wish they went into a bit more technical detail but I guess I can read the paper for that.
“But semidefinite programming has a big limitation: It is slow on large problems and can’t handle many of the most complicated polynomials researchers really care about. Semidefinite programming can be used to find a sum of squares decomposition for polynomials with a handful to about a dozen variables raised to powers no higher than about 6. The polynomials that characterize complex engineering problems — like how to ensure a humanoid robot stays on its feet — can involve 50 or more variables. A semidefinite program could chew on that kind of polynomial until the end of time and still not return a sum of squares answer.”Posted on 2019-11-10T21:10:18+0000
The Baby-Formula Crime Ring
It’s pricey, it’s portable, its users need it constantly, and retailers love to buy it at a discount. All of which makes it a perfect product to steal.
An interesting analysis and breakdown of a pyramid scheme intersecting with a scheme to steal and resell baby formula.
Nothing on how it should be affordable in the first place...
“BETWEEN FACTORY AND BABY AISLE, FORMULA’S CHEAP INGREDIENTS BECOME STEEPLY, EVEN MYSTERIOUSLY EXPENSIVE. BASIC TYPES RUN ABOUT $15 FOR A 12.5-OUNCE CAN, AMOUNTING TO PERHAPS $150 A MONTH FOR A FULLY FORMULA-FED INFANT.”Posted on 2019-11-10T20:57:15+0000
Rust once and share it with Android, iOS and Flutter
Share the same code in Android and iOS and use it in Flutter.. A Barcelona-based web & mobile developer wandering through cyberspace. Organizer of bcn_rust. Currently working at Telefonica Alpha.
Bookmarking this for future use. Interesting technical read on cross platform app development.
Still waiting for the day you can build the UI itself in rust thoughPosted on 2019-11-10T19:56:57+0000
Robinhood Traders Discovered a Glitch That Gave Them ‘Infinite Leverage’
One trader bragged about a $1 million position funded by a $4,000 deposit.
It's always interesting watching the intersection of startups moving quickly/trying to disrupt markets, and industries that are tightly regulated for a good reason.
"Dubbed the “infinite money cheat code” by users of Reddit Inc.’s WallStreetBets forum, the bug is being exploited, according to users on the forum. One trader bragged about a $1 million position funded by a $4,000 deposit."
"One trader managed to turn his $2,000 deposit into $50,000 worth of purchasing power, which he used to buy Apple Inc. puts. He subsequently lost that money and posted a video of the wipe-out on YouTube."
I wonder who the SEC will go after. The traders, Robinhood, or both?Posted on 2019-11-05T19:08:37+0000