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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•1y ago

Comments

trane_project•1y 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/

Reuse Less Software

https://wiki.alopex.li/ReuseLessSoftware
1•birdculture•44s ago•0 comments

Show HN: Mesmereyes – classic HN demos, mashed up and remade for multitouch

https://kmewhort.github.io/vizlib/
1•kmewhort•1m ago•0 comments

AI Breaks the Monopoly of Elegant Software

https://tselai.com/ai-elegant-software-monopoly
1•fforflo•2m ago•0 comments

Chili Peppers of the World: Cultivars, Species, and Heat

https://www.notesfromtheroad.com/desertmexico/chili-peppers.html
2•Tomte•5m ago•0 comments

Pelican, or pelican't? A hint at Claude evals

https://noperator.dev/posts/pelicant/
1•noperator•6m ago•0 comments

70th Anniversary of the first hurricane seeding experiment (2017)

https://www.aoml.noaa.gov/hurricane_blog/70th-anniversary-of-the-first-hurricane-seeding-experiment/
1•thunderbong•9m ago•0 comments

Show HN: Whim-proxy, a vibe-coded tool to reverse-tunnel webhooks to your laptop

https://github.com/kakwa/whim-proxy
1•kakwa_•10m ago•0 comments

Show HN: Portfolio simulator using trend-following indicators and rebalance API

https://algorithmicfire.com/user/alerts
1•paulfdunn•10m ago•0 comments

Treating pancreatic tumours may have revealed cancer's master switch

https://economist.com/science-and-technology/2026/06/12/treating-pancreatic-tumours-may-have-reve...
2•andsoitis•11m ago•0 comments

Has AI Killed How-To Nonfiction?

https://tim.blog/2026/06/12/has-ai-already-killed-nonfiction/
2•Michelangelo11•13m ago•0 comments

Making our AI coding agent the only way we build our product

https://anyframe.dev/blog/we-hired-an-intern-named-gilfoyle
1•nurdtechie98•14m ago•0 comments

Sam Bankman-Fried loses bid to overturn crypto fraud conviction

https://www.reuters.com/legal/government/sam-bankman-fried-loses-bid-overturn-crypto-fraud-convic...
3•1vuio0pswjnm7•21m ago•0 comments

When Washington switched off Fable/Mython 5: What happened, hour by hour

https://twitter.com/kimmonismus/status/2065774154968711429
2•s-macke•21m ago•0 comments

AI can control your Desktop

https://clawdcursor.com
2•AmDab•23m ago•0 comments

Show HN: IssunDB – a new embedded graph database with vector and text search

https://github.com/IssunDB/issun-db
2•habedi0•25m ago•0 comments

How we made continuous trace intelligence possible at scale

https://twitter.com/ankrgyl/status/2062635408182427859
3•gmays•26m ago•1 comments

Show HN: NixOS on Hetzner with OpenClaw in 15 Minutes

https://iraklijani.com/blog/installing-nixos-on-hetzner-metal/
3•ika•31m ago•2 comments

Operation Costs in CPU Clock Cycles (2016)

https://6it.dev/blog/infographics-operation-costs-in-cpu-clock-cycles-741
3•tosh•33m ago•0 comments

An O(x)Caml book that runs

https://kcsrk.info/ocaml/oxcaml/teaching/nptel/llm/2026/06/13/an-oxcaml-book-that-runs/
4•anirudh24seven•34m ago•0 comments

Rust reflection and a multi-array list

https://fnordig.de/2026/03/25/rust-reflection-and-a-multi-array-list/
1•tosh•34m ago•1 comments

Dangerous Technology for Americans Only

https://lucumr.pocoo.org/2026/6/13/americans-only/
5•Tomte•38m ago•4 comments

The only policy tool that cannot be gamed

https://julienreszka.com/blog/the-only-policy-tool-that-cannot-be-gamed/
1•julienreszka•39m ago•0 comments

How iPhones Became Birth Control

https://spectator.com/article/iphones-became-birth-control/
3•pseudolus•43m ago•1 comments

U.S. Military Helping Move 7M Bpd Out of Persian Gulf, Wright Says

https://oilprice.com/Latest-Energy-News/World-News/US-Military-Helping-Move-7-Million-Bpd-Out-of-...
3•netfortius•44m ago•1 comments

Elon Musk Becomes the First Trillionaire. Is That Such a Bad Thing?

https://reason.com/2026/06/12/elon-musk-becomes-the-worlds-first-trillionaire-is-that-such-a-bad-...
4•abc42•46m ago•1 comments

Pentagon forbids export of Apple computers

https://www.youtube.com/watch?v=OoxvLq0dFvw
5•Ecco•46m ago•1 comments

Zig: Extend @Vector for SPIR-V

https://codeberg.org/ziglang/zig/issues/35376
2•tosh•46m ago•0 comments

Wifärt Gallery

https://wifartgallery.com/
3•jasoncartwright•49m ago•0 comments

Good Design Disappears

https://hari.computer/good-design-disappears
2•andytratt•51m ago•0 comments

DVD-JEPA – a JEPA world model that dreams a bouncing DVD logo

https://dvd-jepa.vercel.app
4•mandarwagh•55m ago•0 comments