#education

How to build an air purifier in 6 simple steps

John Alexander built a DIY air purifier for Popular Science and wrote up how it went. The design is a Corsi-Rosenthal box, or CR box: four square furnace filters taped into a cube, a cardboard bottom cut from the fan’s shipping box, and a box fan on top. The fan pulls air in through the […]

Adafruit Blog · EN

Cost of college versus the return on investement

For the New York Times, Arfa Momin and Ron Lieber charted median income… Tags: college , education , income , New York Times

FlowingData · EN

5 Things I’ve Come to Believe as the Founder of a Nonprofit

by Sal Khan, founder of Khan Academy More than two decades ago, I started tutoring my cousins. In ... Read more The post 5 Things I’ve Come to Believe as the Founder of a Nonprofit appeared first on Khan Academy Blog .

Khan Academy Blog · EN

What are the Worst MR Posts?

What are the worst MR posts, most illogical, poorly reasoned, low value, inconsistent? From the Archives, written by ChatGPT: These are provisional candidates for weak reasoning, selected because there is a specific gap between the evidence and the conclusion. This is not an objective ranking of all 40,326 posts in the downloaded archive. Poor reasoning […] The post What are the Worst MR Posts? appeared first on Marginal REVOLUTION .

Marginal Revolution · EN

Should you feel grief for the dead who go to heaven?

I am not myself religious, but let us consider the possible gulf between behavior and doctrine amongst those who are. It has long struck me as a kind of mini-puzzle why people feel so much grief for the departed, at least for the departed who are supposed to be headed for heaven (and yes there […] The post Should you feel grief for the dead who go to heaven? appeared first on Marginal REVOLUTION .

Marginal Revolution · EN

Catholic Preschools Decided They Couldn’t Allow a Certain Kind of Student. The Fallout Could Change School Funding Forever.

They want to have their cake—your tax dollars—and eat it too.

Slate · EN

Teaching Students to See What They Miss

A classroom exercise in slow looking uses art to sharpen observation skills and encourage more attentive listening. The post Teaching Students to See What They Miss appeared first on JSTOR Daily .

JSTOR Daily · EN

Why You Don't Need Focus Stacking for Every Landscape

Focus stacking has become close to a default step in landscape work, with plenty of people blending 20 or even 50 frames so every rock and grass blade is sharp from front to back. Whether that effort shows up in the final image, or whether a single frame focused at the hyperfocal distance would look the same, decides how much of your time goes into focus while the light keeps changing. [ Read More ]

Fstoppers · EN

The Case for Photographing the Place You Already Know

The places you see every week are the ones you're least likely to photograph, since they feel too familiar to bother with. Familiar doesn't last, and the village fair or street corner you skip this year is exactly what someone will want to see decades from now. [ Read More ]

Fstoppers · EN

Chasing a Vivid Fog Bow and a Golden Gate Bridge Shot Years in the Making

Fog in the San Francisco Bay Area can bury a scene in seconds and hand it back a minute later with trees, towers, and light arranged in ways you won't see again. Shooting it well means working quickly, reading the direction of the light, and resisting the urge to stick with the first composition that looks good. [ Read More ]

Fstoppers · EN

A job that changed me: I ran observatory tours as a student. An eight-year-old’s question taught me two important lessons

I thought the explanation I’d given about black holes was family-friendly. But, after what she had said, I had to rethink my examples Read more in the a job that changed me series In the first year of my science degree, I was fortunate to land a job as an astronomy guide at the Sydney Observatory. In my role, I would lead tour groups of about 20 people. We’d look at stars and planets through telescopes. If the skies were filled from horizon to horizon with clouds, we’d explore more of the universe through a 3D theatre. And to peer beyond what our telescopes could see, we’d pile inside the cosy

Guardian Science · EN