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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/

Anthropic and OpenAI are competing to see whose agents can go rogue harder

https://www.theregister.com/security/2026/07/31/anthropic-and-openai-are-competing-to-see-whose-a...
1•joebuckwilliams•58s ago•0 comments

Tesla Weighs China Unit Sale Ahead of SpaceX Deal

https://www.bloomberg.com/news/articles/2026-07-31/tesla-weighs-china-unit-sale-ahead-of-spacex-d...
1•chollida1•1m ago•0 comments

Show HN: Axioma – Stream and data compression engine for low-bandwidth links

https://github.com/axmstandart1-beep/axioma/tree/main
1•abbasov_murad•3m ago•0 comments

A big win for Android interoperability

https://www.openhomefoundation.org/blog/a-big-win-for-android-interoperability/
2•soheilpro•5m ago•0 comments

The most official water costs $120k a gallon

https://signoregalilei.com/2026/07/26/the-most-official-water-costs-120000-a-gallon/
2•surprisetalk•6m ago•0 comments

From Sketch to Steel: The Isometric to Iron Organic Hoodie Story

https://ddsboston.com/blogs/news/from-sketch-to-steel-the-isometric-to-iron-organic-hoodie-story
1•robert_dds•6m ago•0 comments

PyTorch Multi-Process Inference Weight Sharing via Inter-Process Communication

https://leimao.github.io/blog/PyTorch-IPC-Multi-Process-Inference-Weight-Sharing/
1•eigenBasis•8m ago•0 comments

Defrag Incremental on Steam

https://store.steampowered.com/app/4286660/Defrag_Incremental/
1•ohjeez•8m ago•0 comments

Show HN: I built a cross-browser extension that controls fingerprinting surfaces

https://privacything.com/en/
1•tomaszjanusz•9m ago•0 comments

16-bit Serial Homebrew CPU – 2023

https://www.jiristepanovsky.cz/project.php?p=23cpu
1•num42•9m ago•0 comments

What Is Digital Sovereignty

https://blog.documentfoundation.org/blog/2026/07/28/what-is-digital-sovereignty/
2•hn_acker•9m ago•0 comments

Maze Toys

https://maze.toys
1•bookofjoe•10m ago•0 comments

Show HN: Spryly – Track outdated dependencies across every repo and registry

https://spryly.io
1•aquamulier•11m ago•0 comments

Why ugly buildings create NIMBYism

https://www.worksinprogress.news/p/why-ugly-buildings-create-nimbyism
1•bensouthwood•11m ago•0 comments

Rails: Arbitrary file read and remote code execution in Active Storage

https://discuss.rubyonrails.org/t/cve-2026-66066-possible-arbitrary-file-read-and-remote-code-exe...
1•lobo_tuerto•13m ago•0 comments

U.S. Weighs $100k Fee for Foreign Students Wanting to Work After Graduation

https://www.wsj.com/politics/policy/u-s-weighs-100-000-fee-for-foreign-students-wanting-to-work-a...
4•fht•13m ago•1 comments

Claude won't let me talk about the Gaza genocide

https://evanp.me/2026/07/23/claude-wont-let-me-talk-about-the-gaza-genocide/
2•speckx•14m ago•0 comments

A Ton of Space Junk Tumbles Unpredictably to Earth Every Week

https://www.nytimes.com/2026/07/31/world/asia/space-debris-falling-crashing-earth-risk.html
4•bicepjai•16m ago•2 comments

Show HN: AI Security Breaches, the problems and it's causes

https://raylinement.substack.com/p/ai-security-breaches-the-problems
1•rzwsan•16m ago•0 comments

Opkssh integrating single sign-on with SSH (2025)

https://www.ethanheilman.com/x/33/index.html
1•EthanHeilman•19m ago•0 comments

Text Is My Gimmick

https://aethermug.com/posts/text-is-my-gimmick
1•mrcgnc•21m ago•0 comments

Why in Building Protocols, Like Code, Starting over Is Dumb

https://lowentropy.net/posts/whole-new-protocol/
1•speckx•21m ago•0 comments

Show HN: A little physical breakout clone

https://brontosaurusrex.github.io/physical/v7/
2•brontosaurusrex•23m ago•0 comments

Alternative Medicine for Chickens

https://ambrook.com/offrange/livestock/they-gave-grapes-to-a-chicken
1•surprisetalk•24m ago•0 comments

NASA Just Spotted a Wandering Black Hole Devouring a Star

https://nautil.us/nasa-just-spotted-a-wandering-black-hole-devouring-a-star-1283245
2•Brajeshwar•25m ago•0 comments

Show HN: BitBang – turn any machine into a URL

https://github.com/richlegrand/bitbang-cli
1•narragansett•25m ago•1 comments

Bypassing Claude's upload limits, 4x (500 MB → 2 GB)

https://blog.zernote.com/2gb-user-interviews-into-claude/
4•fenix1851•25m ago•0 comments

Why AI investor Leopold Aschenbrenner is selling all stocks

https://www.cnbc.com/2026/07/30/leopold-aschenbrenners-hedge-fund-is-facing-steep-ai-losses.html
2•speckx•26m ago•0 comments

How many people are dying as a result of USAID's demise?

https://www.economist.com/finance-and-economics/2026/07/30/how-many-people-are-dying-as-a-result-...
4•andsoitis•26m ago•0 comments

Booritney's ultimate guide to meal prep

https://www.booritney.com/p/booritneys-ultimate-guide-to-meal
1•tasshin•28m ago•0 comments