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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/

What you need to know about new customs charges when buying from outside the EU

https://www.rte.ie/news/ireland/2026/0630/1581002-custom-charges-q-a/
1•austinallegro•40s ago•0 comments

It's Time to Reserve Your WhatsApp Username

https://about.fb.com/news/2026/06/its-time-to-reserve-your-whatsapp-username/
1•Markoff•1m ago•0 comments

Rails App Just Got Acquired. Now What?

https://blog.planetargon.com/blog/entries/your-rails-app-just-got-acquired-now-what
1•robbyrussell•1m ago•0 comments

Leanstral 1.5

https://docs.mistral.ai/models/model-cards/leanstral-1-5-26-06
1•vetronauta•1m ago•0 comments

DHH: Basecamp 5, Vibe Coding, and the Future of Rails

https://podcast.rubyonrails.org/2462975/episodes/19335416-dhh-basecamp-5-vibe-coding-and-the-futu...
1•robbyrussell•1m ago•1 comments

Microsoft reveals Windows 11's Docker Replacement WSL Containers to ship soon

https://www.windowslatest.com/2026/06/28/microsoft-denies-wsl-3-exists-reveals-windows-11s-wsl-co...
1•devy•2m ago•0 comments

Rails: 13 Years of Rails at the Auto Shop

https://podcast.rubyonrails.org/2462975/episodes/19319172-nikky-southerland-lessons-from-13-years...
1•robbyrussell•2m ago•1 comments

Magicbookshelf.org – Using AI to create a spoiler-free companion to any book

https://magicbookshelf.org/read/pride-and-prejudice/
1•philipfweiss•3m ago•0 comments

Labelling AI-Generated Content in China

https://ocpl.substack.com/p/labelling-ai-generated-content-in
1•petethomas•3m ago•0 comments

An arbitrary-palette positional dithering algorithm

https://bisqwit.iki.fi/story/howto/dither/jy/
1•fanf2•4m ago•0 comments

UK watchdog plans to break Apple and Google's 'effective duopoly' on app stores

https://www.theguardian.com/business/2026/jun/30/uk-apple-google-mobile-app-stores-developers-pay...
2•pseudolus•4m ago•0 comments

I Snuck This Boat Through a Military Blockade [video]

https://www.youtube.com/watch?v=5Dvu7qiM5rg
1•Varelion•5m ago•0 comments

NASA aims to save a sinking space telescope with a rendezvous in orbit

https://www.nbcnews.com/science/space/nasa-swift-boost-mission-save-sinking-space-telescope-rcna3...
2•voxadam•5m ago•0 comments

Holos Social: Self-hosted Fediverse client

https://explore.alt.store/@holos/116824788231911251
1•gloxkiqcza•6m ago•0 comments

Periskop – product discovery (MCP/API) for AI agents

https://www.periskop.ai
1•duarteapereira•6m ago•0 comments

Codex Exfiltrates Connector Data

https://www.promptarmor.com/resources/codex-for-everything-exfiltrates-connected-data
2•hackerBanana•7m ago•0 comments

In 5 years, nobody will give a damn about AI-detectors

https://www.joanwestenberg.com/p/in-5-years-nobody-will-give-a-damn
1•fallinditch•9m ago•0 comments

macOS: Code_sign_clone grows unbounded (62 GB+) across Codex auto-updates

https://github.com/openai/codex/issues/27536
2•ValentineC•9m ago•0 comments

Logging in to Use Old Reddit

https://old.reddit.com/r/modnews/comments/1ujtebf/logging_in_to_use_old_reddit/
1•easton•9m ago•0 comments

Core Dump Epidemiology

https://openai.com/index/core-dump-epidemiology-data-infrastructure-bug/?trk=feed-detail_main-fee...
1•coffepot77•11m ago•1 comments

Bill C-34 Answers Child Safety with Identity Infrastructure

https://ethanplant.ca/writing/bill-c-34/
1•ethanplant•11m ago•0 comments

Build, run, and market businesses 24/7 with AI

https://www.leapd.ai
2•Cyrus2050•12m ago•1 comments

Prompt Injection as Role Confusion

https://www.theregister.com/ai-and-ml/2026/06/30/security-researchers-tricked-llms-into-giving-th...
1•romaniitedomum•12m ago•0 comments

Show HN: Kage, verification and freshness for Google's OKF agent memory

https://kage-core.com/
1•kage18•16m ago•0 comments

Huntress CEO: employee used 'poor judgment' in alerting criminal

https://www.theregister.com/security/2026/06/30/huntress-ceo-says-threat-hunter-used-poor-judgmen...
1•romaniitedomum•17m ago•0 comments

Grok's Traffic Is Mostly Driven by Adult Content

https://www.forbes.com/sites/maryroeloffs/2026/06/24/groks-traffic-is-mostly-driven-by-adult-cont...
13•sorenjan•25m ago•3 comments

Ask HN: Which payment processor/merchant-of-record do you use in 2026?

2•moonlighter•27m ago•0 comments

Google pulls the plug on Tenor API, killing GIF pickers around the web

https://9to5google.com/2026/06/30/google-tenor-api-gif-updates/
1•thm•28m ago•0 comments

Something Is Wrong with Modern Longevity Science

https://www.newyorker.com/magazine/2026/07/06/morbid-saul-justin-newman-book-review-eat-your-ice-...
4•nabbed•29m ago•3 comments

The future must belong to Small Language Models

https://unvoid.substack.com/p/the-guilt-machine
2•nullscribe•33m ago•0 comments