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Bloom's two sigma problem (2020)

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

Comments

trane_project•8mo 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/

Scientists engineer unsinkable metal tubes

https://www.rochester.edu/newscenter/unsinkable-metal-tubes-superhydrophobic-surfaces-691642/
1•paulpauper•25s ago•0 comments

We should be talking about zombie reasoning

https://thepursuitofliberalism.substack.com/p/why-we-should-be-talking-about-zombie
1•paulpauper•1m ago•0 comments

Sustainable thermal paper formulation using lignocellulosic biomass fractions

https://www.science.org/doi/10.1126/sciadv.adw9912
1•westurner•2m ago•1 comments

Why is OpenAI so stingy with ChatGPT web search?

https://justin.searls.co/shots/2026-02-01-11h13m37s/
2•mefengl•4m ago•0 comments

Show HN: A simple Rust daemon that monitors URLs and triggers local scripts

https://github.com/skorotkiewicz/upi
1•modinfo•4m ago•0 comments

AGI, ASI, A*I – Do we have all we need to get there?

https://www.johndcook.com/blog/2026/01/30/agi-asi-ai-do-we-have-all-we-need-to-get-there/
1•ibobev•5m ago•0 comments

Once Thought to Support Neurons, Astrocytes Turn Out to Be in Charge

https://www.quantamagazine.org/once-thought-to-support-neurons-astrocytes-turn-out-to-be-in-charg...
2•ibobev•5m ago•0 comments

LLMs Keep on Getting Better

https://probablydance.com/2026/01/31/how-llms-keep-on-getting-better/
1•ibobev•6m ago•0 comments

Light exposure and aspects of cognitive function in everyday life

https://www.nature.com/articles/s44271-025-00373-9
2•PaulHoule•6m ago•0 comments

FOSDEM: Open-Source Is Political – Resist Organize Protect

https://ftp.belnet.be/mirror/FOSDEM/video/2026/janson/SFKNTZ-welcome_to_fosdem_2026.mp4
1•obeleh•8m ago•0 comments

Slurping the Claude Code Word Soup

https://indiantinker.bearblog.dev/slurping-the-claude-code-word-soup/
1•indiantinker•8m ago•0 comments

Show HN: WikiReplay – a time‑lapse diff viewer for Wikipedia

https://wikireplay.com/
1•blurayfin•8m ago•0 comments

Recreating the Chernobyl Reactor 4 control panel

https://www.youtube.com/watch?v=DDlrnJIbkds
1•nar001•9m ago•1 comments

China's genius plan to win the AI race is paying off

https://www.ft.com/content/68f60392-88bf-419c-96c7-c3d580ec9d97
1•fmihaila•9m ago•0 comments

Rosebud: Create Games with AI

https://rosebud.ai/
1•doener•13m ago•0 comments

AI-induced cultural stagnation is no longer speculation − it's happening

https://theconversation.com/ai-induced-cultural-stagnation-is-no-longer-speculation-its-already-h...
3•smartmic•13m ago•0 comments

Is AI "good" yet? – tracking Hacker News sentiment on AI coding

https://www.is-ai-good-yet.com
2•ilyaizen•15m ago•0 comments

Internet world despairs as non-profit .org sold for $$$$ to private equity firm

https://www.theregister.com/2019/11/20/org_registry_sale_shambles/
2•fanf2•16m ago•0 comments

L4Ka: Pistachio Microkernel

https://www.l4ka.org/65.php
2•doener•16m ago•0 comments

AI agent discovers security flaw in OpenClaw, other agents discuss how to fix it

https://www.moltbook.com/post/cbd6474f-8478-4894-95f1-7b104a73bcd5
2•DustinEchoes•17m ago•0 comments

Moltbook's Limitations Beyond the Viral Hype

https://gilpignol.substack.com/p/moltbooks-limitations-beyond-the
2•light_triad•18m ago•0 comments

The L4Re Operating System Framework

https://l4re.org/
3•doener•19m ago•0 comments

Ian's Shoelace Site

https://www.fieggen.com/shoelace/
2•righthand•20m ago•1 comments

Former Google Engineer Found Guilty of Economic Espionage,Theft of AI Technology

https://www.justice.gov/opa/pr/former-google-engineer-found-guilty-economic-espionage-and-theft-c...
3•737min•20m ago•0 comments

Show HN: I made a bookmarks assistant for people who save lots of links and tabs

https://apps.apple.com/us/app/eyeball-bookmarks-assistant/id6670705634
1•quinto_quarto•21m ago•0 comments

The King and the Wizard

https://campedersen.com/eigenpute
1•ecto•23m ago•0 comments

Microsoft's $381B Rout Exposes Dark Side of the AI Binge

https://www.bloomberg.com/news/articles/2026-02-01/microsoft-s-381-billion-rout-exposes-dark-side...
4•zerosizedweasle•24m ago•0 comments

Imaging the Wigner crystal state in a new type of quantum material

https://phys.org/news/2026-01-imaging-wigner-crystal-state-quantum.html
1•rbanffy•27m ago•0 comments

Why Airbnb Never Became a Trillion-Dollar Company

https://gilpignol.substack.com/p/why-airbnb-never-became-a-trillion
1•light_triad•29m ago•0 comments

Crux Ansata

https://gutenberg.net.au/ebooks13/1303501h.html
1•joebig•29m ago•0 comments