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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•11mo ago

Comments

trane_project•11mo 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/

A live hantavirus outbreak tracker auto-curated by Claude

https://aihuynya.com/hanta/
1•antroos•6m ago•0 comments

I want to create fintech in Latam, someone with experience can guide me?

1•cleanIsGud•14m ago•0 comments

Cloudflare Based URL Shortener Open Source

https://github.com/clarkhacks/RdRx
1•clarkhacks•16m ago•0 comments

I built a sports partner matching app because finding players in BA is broken

https://movea.com.ar/
1•cleanIsGud•16m ago•0 comments

Universal file converter, one handlers table

https://github.com/freeaigit/free-convert
1•nadermx•18m ago•0 comments

California's Battery Array Is as Powerful as 12 Nuclear Power Plants

https://zolairenergy.com/californias-battery-array-is-as-powerful-as-12-nuclear-power-plants-here...
2•zingerlio•21m ago•0 comments

Schanuel's Conjecture and the Semantics of Triton's FPSan

https://cp4space.hatsya.com/2026/05/03/schanuels-conjecture-and-the-semantics-of-fpsan/
2•c1ccccc1•29m ago•0 comments

Astrometry – automatic recognition of astronomical images

https://github.com/dstndstn/astrometry.net
1•modinfo•34m ago•0 comments

CVE-2026-40369 – Windows Kernel Elevation of Privilege Vulnerability

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40369
4•l2dy•38m ago•1 comments

My Mental Model of Learning

https://gcapu.com/posts/on_learning.html
1•gcapu•39m ago•1 comments

What we should be afraid of in AI (2021)

https://roganov.me/blog/ai-real-fears/
1•IFC_LLC•54m ago•0 comments

Ask HN: Is there anything built around AI context drift problem to fix?

1•abhishek2580•54m ago•2 comments

Show HN: 3D Tetris

http://www.hb.codes/
1•HBcodes•1h ago•1 comments

Agentic Memory – The Follow Up

https://blog.mikiobraun.de/2026/04/agentic-memory-the-follow-up
1•car•1h ago•0 comments

California governor candidate under investigation over payments to influencers

https://www.washingtonpost.com/technology/2026/05/15/tom-steyers-influencer-campaign-triggers-cal...
4•MilnerRoute•1h ago•0 comments

AWS found bugs in 60% of requirements. Its fix is 50-year-old logic engine

https://thenewstack.io/kiro-requirements-analysis-automated-reasoning/
1•nslog•1h ago•0 comments

The Spirit Airlines Repo Operation [video]

https://www.youtube.com/watch?v=moEixIux1b0
1•chacha102•1h ago•0 comments

Japan runs out of robot wolves in fight against bears

https://www.popsci.com/environment/japan-robot-wolf-army/
1•thunderbong•1h ago•0 comments

Gen Z homeowners: More in their 20s are managing to buy despite the odds

https://text.npr.org/nx-s1-5791499
2•1659447091•1h ago•0 comments

Why 'Smart' Products Have Started to Look Like the Dumb Choice

https://www.nytimes.com/2026/05/14/magazine/dumb-phones-tvs-retronym-smart-tech.html
5•0in•1h ago•0 comments

Theron – a council of 31 specialist LLMs on one foundation

https://tryvext.com/landing
1•alayton•1h ago•0 comments

Craigslist Charitable Fund

https://www.craigslistfund.org
1•Yctg•1h ago•0 comments

JGuard v0.4.0 – Capability-based security for the JVM (post-SecurityManager)

https://github.com/jguard-io/jguard
1•nknize•1h ago•0 comments

Quantum Computing Expert Explains One Concept in 5 Levels of Difficulty [video]

https://www.youtube.com/watch?v=OWJCfOvochA
1•gmays•1h ago•0 comments

Apple TV 12% market share, reaping benefits of stale content

https://appleinsider.com/articles/26/04/20/apple-tv-reaping-the-benefits-of-stale-content-on-bigg...
1•mgh2•1h ago•0 comments

NCEES discontinuing PE Software Engineering exam (2019)

https://ncees.org/ncees-discontinuing-pe-software-engineering-exam/
1•consumer451•1h ago•1 comments

AI for the Real World: A Conversation with Yann LeCun

https://twitter.com/AnneliesGamble/status/2054219457451733382
2•gmays•1h ago•0 comments

The Evolution of Team Appwrite

https://appwrite.io/blog/post/the-evolution-of-team-appwrite
1•gauravmeena95•1h ago•0 comments

Production Is a Compiler Input

https://aicoding.leaflet.pub/3mjx4erlboc2l
1•ankitg12•1h ago•0 comments

Two computers, one monitor, zero fiddling – Alex Plescan

https://alexplescan.com/posts/2025/08/16/kvm/
2•ankitg12•1h ago•0 comments