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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/

Turn your PC, Mac, or Linux box into an AI server

https://github.com/Light-Heart-Labs/DreamServer
1•dreamserver•59s ago•0 comments

AI Shocker

https://www.efinancialcareers.com/news/citi-s-global-head-of-ai-joined-in-september-and-has-just-...
1•GHHardy•1m ago•0 comments

Lawmakers propose banning all U.S.-Chinese research collaborations

https://www.science.org/content/article/lawmakers-propose-banning-all-u-s-chinese-research-collab...
1•ceejayoz•3m ago•0 comments

Why AI-generated draw.io AWS diagrams have empty squares (and a fix)

https://github.com/vidanov/aws-architecture-diagram-skill
1•vidanov•3m ago•0 comments

Know Your Point C

https://pointc.co/know-your-point-c/
2•benwerd•3m ago•0 comments

How should we think about Starship?

https://mceglowski.substack.com/p/how-should-we-think-about-starship
1•simonebrunozzi•4m ago•0 comments

Bare: Small and modular JavaScript runtime for desktop and mobile

https://github.com/holepunchto/bare
1•janandonly•4m ago•0 comments

Show HN: Scan your AI agent's code for tool calls with no checks

https://github.com/Diplomat-ai/diplomat-agent-ts
1•jguarnelli•5m ago•0 comments

Malware dev tries to steal Claude users secrets NPM slop, leaks own GitHub token

https://www.theregister.com/cyber-crime/2026/05/27/supply-chain-brain-drain-npm-attacker-foolishl...
1•Bender•7m ago•0 comments

Taste Is Necessary but Not Sufficient When Working with Agents

https://www.ssp.sh/brain/having-taste-with-ai/
2•zazuke•7m ago•0 comments

Show HN: Open-source alternative to Codex Chronicle, using Apple's local OCR

https://github.com/familiar-software/familiar
2•talsraviv•7m ago•0 comments

Where Are the Economies of Scale in Homebuilding?

https://www.construction-physics.com/p/where-are-the-economies-of-scale
3•crescit_eundo•8m ago•0 comments

Why does it take so long to mend an escalator? (2002)

https://www.lrb.co.uk/the-paper/v24/n05/peter-campbell/why-does-it-take-so-long-to-mend-an-escalator
2•downbad_•8m ago•0 comments

Vibe Gets to Work

https://mistral.ai/news/vibe-agent/
2•hacb•9m ago•0 comments

Never Pay for Claude

https://github.com/RyanKung/rotom
4•ryankung•10m ago•2 comments

How to avoid being outsourced or open sourced (2008)

https://www.johndcook.com/blog/2008/02/12/how-to-avoid-being-outsourced-or-open-sourced/
3•tapanjk•11m ago•0 comments

SpaceX-Stasy

https://substack.com/@edwardelson/p-199273735
2•simonebrunozzi•11m ago•0 comments

The Long, Bitter Fight at the Park Slope Food Co-Op

https://www.nytimes.com/2026/05/28/nyregion/the-long-bitter-fight-at-the-park-slope-food-co-op.html
2•brandonb•11m ago•0 comments

Check our new AI developer tool and please REVIEW

https://github.com/pwnaxe/squick
2•TrueSTRX•12m ago•0 comments

En Svensk Tiger

https://en.wikipedia.org/wiki/En_svensk_tiger
2•verandaguy•12m ago•0 comments

Company CEO flooded file share with smut, called for help after he deleted it

https://www.theregister.com/security/2026/05/28/company-ceo-flooded-file-share-with-smut-called-f...
2•Bender•13m ago•0 comments

Under the River

https://shopify.engineering/under-the-river
3•burke•13m ago•0 comments

AI hiring algorithms reject Black, Asian job seekers at higher rates

https://www.theregister.com/ai-ml/2026/05/27/ai-hiring-algorithms-reject-black-asian-job-seekers-...
2•Bender•13m ago•1 comments

Blood pressure tech floods the market after FDA relaxes wearables oversight

https://www.statnews.com/2026/05/28/fda-wellness-guidance-unvetted-blood-pressure-tech-floods-mar...
2•brandonb•13m ago•1 comments

Ask HN: Did forums solve what Discord and Reddit still don't?

4•tolarianwiz•13m ago•0 comments

Vc: SIMD Vector Classes for C++

https://github.com/vcdevel/vc
2•tosh•14m ago•0 comments

Five contributions to a project: money, effort, attention, memory and wisdom

https://improvesomething.today/five-contributions-to-a-project/
2•surprisetalk•14m ago•0 comments

France's parliament votes to repeal slavery-era "Black Code" laws

https://www.washingtonpost.com/business/2026/05/28/france-slavery-law-code-noir-repeal/220dedaa-5...
2•nkg•14m ago•0 comments

NPM staged publishing setup with approximately one click per package

https://lavamoat.github.io/stageclicker/
3•naugtur•15m ago•0 comments

Marines turn to modified Call of Duty 4 to train new sergeants

https://www.stripes.com/branches/marine_corps/2026-05-22/call-of-duty-4-marines-sergeants-school-...
2•randycupertino•15m ago•0 comments