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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•6mo ago

Comments

trane_project•6mo ago
> Nonetheless, Bloom was on to something: Tutoring and mastery learning do have a degree of experimental support, and fortunately it seems that carefully designed software systems can completely replace the instructional side of traditional teaching, achieving better results, on par with one to one tutoring. However, designing them is a hard endeavour, and there is a motivational component of teachers that may not be as easily replicable purely by software.

I've been working on an implementation of mastery learning and other related techniques called Trane (https://github.com/trane-project/trane/) for the past three years or so. Mastery learning is the main one, but it also integrates spaced repetition, interleaving, mixing difficulties, and reward propagation (doing well or bad in an exercise affects how related exercises are scheduled).

I think it works pretty well, but you need to pair it with proper pedagogy of the skill you want to learn and the proper curriculum. The latter is the hardest part, so it's being my main limitation. I've used some external resources to build courses, and they work well, but obviously it would work much better with a full curriculum built from the ground up.

Currently working on Pictures Are For Babies (https://picturesareforbabies.com/), which is meant to do just that for literacy. I am hoping to do a first release soon. As for the motivation angle, the solution in this particular instance is fairly simple. Use the software to enforce scheduling andpedagogy,y and a human tutor to provide emotional and social support. This division allows any literate person to become an effective tutor with a few hours of training.

I am hoping that the average student can complete the whole curriculum in five years. That would mean that (assuming they start at between 4 and 5 years old), the average student would have college-level reading and writing skills by the time they are nine or ten.

Most complete explanation so far is in the pedagogy page: https://picturesareforbabies.com/home/pedagogy/

Rcarmo/kata: Repetition makes perfect

https://github.com/rcarmo/kata
1•rcarmo•1m ago•0 comments

Epstein, Israel, and the CIA: Iran-Contra Planes at Les Wexner's Base

https://www.dropsitenews.com/p/jeffrey-epstein-iran-contra-planes-leslie-wexner-pottinger-leese-a...
1•dluan•5m ago•0 comments

The 8 Worst Technology Flops of 2025 [MIT Review]

https://www.technologyreview.com/2025/12/18/1130106/the-8-worst-technology-flops-of-2025/
1•randycupertino•6m ago•0 comments

Bake Sales to Save Nature: Why Wall Street Conservation Survives

https://onlinelibrary.wiley.com/doi/full/10.1111/dech.70035
1•Biologist123•6m ago•0 comments

DraftKings forced to pay $923,000 to gambler who exploited glitch

https://notthebee.com/article/draftkings-forced-to-pay-bettor-923000-after-he-took-advantage-of-a...
1•nomilk•8m ago•0 comments

Show HN: AI Audience Platform for Practicing Public Speaking

https://spuai.github.io
2•speakupai•10m ago•0 comments

Ask HN: Has anyone used AI to write a full-length book?

1•eibrahim•13m ago•0 comments

A Reddit post blew Brown University shooting investigation wide open

https://news.sky.com/story/how-a-reddit-post-blew-brown-university-shooting-investigation-wide-op...
1•randycupertino•13m ago•1 comments

Gh-nvim-username-keywords: GitHub -mention Autocomplete in Your Neovim Editor

https://www.joshbeckman.org/blog/practicing/ghnvimusernamekeywords-github-mention-autocomplete-in...
1•bckmn•14m ago•0 comments

Using Pong as a stress test for compiler development

https://www.reddit.com/r/Compilers/s/ld2dR4LnFh
2•azhenley•14m ago•0 comments

Meta is testing a feature that makes you review accounts before following them

https://pbs.twimg.com/media/G8jnJOEWoAAOSB6?format=jpg&name=large
1•3Samourai•17m ago•0 comments

Microsoft made another Copilot ad where nothing works

https://www.theverge.com/report/847056/microsoft-copilot-ai-vision-pc-assistant-christmas-holiday-ad
2•Topfi•18m ago•0 comments

The post-GeForce era: What if Nvidia abandons PC gaming?

https://www.pcworld.com/article/3013044/the-post-geforce-era-what-if-nvidia-abandons-pc-gaming.html
1•pyprism•18m ago•0 comments

Mapping China's Surnames

https://www.andrewstokols.com/blog/460
1•fzliu•21m ago•0 comments

Show HN: Taupy – fast Python desktop apps without Electron

https://github.com/S1avv/taupy
2•s1jor•21m ago•0 comments

Chrome AI Playback: Deligtful, Wild and Disconcerting

https://blog.certisfy.com/2025/12/chrome-ai-playback-deligtful-wild-and.html
1•Edmond•22m ago•0 comments

More is different (1972) [pdf]

https://www.tkm.kit.edu/downloads/TKM1_2011_more_is_different_PWA.pdf
1•andsoitis•23m ago•0 comments

Show HN: Free Spelling Test Generator

https://minform.io/tools/spelling-test-generator
1•eashish93•23m ago•0 comments

Robotics Levels of Autonomy

https://newsletter.semianalysis.com/p/robotics-levels-of-autonomy
1•nowflux•25m ago•0 comments

NetBox 4.5 Beta

https://netboxlabs.com/blog/announcing-the-netbox-4-5-beta/
1•mrmrcoleman•25m ago•0 comments

Show HN: Stickerbox, a kid-safe, AI-powered voice to sticker printer

https://stickerbox.com/
5•spydertennis•28m ago•1 comments

Astrophotography Target Planner: Discover Hidden Nebulas

https://astroimagery.com/techniques/imaging/astrophotography-target-planner/
1•kianN•28m ago•0 comments

Ken MacLeod on the life and work of the late sc-fi legend Iain M. Banks [video]

https://www.youtube.com/watch?v=r7OW6A8XCgg
3•petethomas•31m ago•0 comments

AI's Unpaid Debt: How LLM Scrapers Destroy the Social Contract of Open Source

https://www.quippd.com/writing/2025/12/17/AIs-unpaid-debt-how-llm-scrapers-destroy-the-social-con...
8•birdculture•35m ago•0 comments

React Server Components Explorer

https://overreacted.io/introducing-rsc-explorer/
1•elierotenberg•36m ago•0 comments

Adobe Photoshop Source Code (2013)

https://computerhistory.org/blog/adobe-photoshop-source-code/
2•rbanffy•38m ago•0 comments

Something Big Happened in 1998

https://openpath.quest/2025/something-big-happened-in-1998/
2•coloneltcb•39m ago•0 comments

An Existential Guide To: Making Friends

https://theshadowedarchive.substack.com/p/an-existential-guide-to-making-friends
1•FigurativeVoid•40m ago•0 comments

How PyTorch Generates Random Numbers in Parallel on the GPU

https://blog.codingconfessions.com/p/how-pytorch-generates-random-numbers
2•rbanffy•41m ago•0 comments

When Were Things the Best?

https://thezvi.wordpress.com/2025/12/19/when-were-things-the-best/
1•speckx•43m ago•0 comments