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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/

Stack Rankings: A Comprehensive Guide

https://www.thehumancapitalhub.com/articles/stacked-rankings-a-comprehensive-guide
1•akkartik•1m ago•0 comments

Can A.I. Keep a Parent Alive?

https://www.newyorker.com/news/as-told-to/can-ai-keep-a-parent-alive
1•petethomas•5m ago•0 comments

Study: "Mommy, do you love your phone more than me?"

https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2026.1766665/full
1•hbcondo714•9m ago•0 comments

Show HN: I built a free app for New Yorkers to save money on groceries

https://sbnyc.app/
2•eli_yumnik•12m ago•0 comments

Fraym – AI that creates product demo videos for you

https://tryfraym.com
1•jrud•13m ago•0 comments

Just shipped rate limiting for hypersonic.js

https://github.com/hypersonic-js/hypersonic-js
1•joaquim_d•13m ago•1 comments

What will define Elon Musk's legacy? DOGE cuts to USAID Ebola programs

https://www.theguardian.com/technology/2026/jul/07/elon-musk-doge-cuts-usaid-ebola
4•tastyface•15m ago•1 comments

We cannot wait for better post-quantum signature algorithms

https://blog.cloudflare.com/ml-dsa-will-have-to-do/
1•mappu•18m ago•0 comments

Cleveland Fed's Hammack says AI could fuel inflation, rate hikes may be needed

https://www.cnbc.com/2026/06/30/cleveland-fed-president-hammack-sees-ai-fueling-inflation-says-ra...
2•mapping365•19m ago•0 comments

The 'Father of the Internet' is finally retiring

https://techcrunch.com/2026/06/30/the-father-of-the-internet-is-finally-retiring/
2•compiler-guy•23m ago•0 comments

Surgeons face higher infertility rates. UC may make it even harder to have kids

https://sfstandard.com/2026/07/09/ucsf-surgical-residents-fertility-benefits-occupational-hazard/
2•littlexsparkee•25m ago•1 comments

Warsh picks ex-BoE chief Mervyn King and tech boss Marc Andreessen to reform Fed

https://www.ft.com/content/e45a34e0-cd96-4b72-9ff3-380efc28a705
1•JumpCrisscross•27m ago•0 comments

Ukraine: How a kamikaze drone partially AI operated is attacking Russian convoys

https://www.france24.com/en/europe/20260601-ukraine-kamikaze-drone-partially-operated-ai-attackin...
1•rawgabbit•31m ago•0 comments

Total Construction Spending: Manufacturing in the United States

https://fred.stlouisfed.org/series/TLMFGCONS
1•mooreds•33m ago•0 comments

Show HN: Fortress – a stealth Chromium so your agents stop getting blocked

https://tilion.dev
5•arhamislam5766•34m ago•0 comments

Ask HN: What are you running locally on your machine with LLMs?

2•agcat•36m ago•1 comments

Goldman Sachs limits prediction market betting for employees

https://www.ft.com/content/7a2a3200-763f-4141-8372-f2f6afba521d
7•petethomas•36m ago•0 comments

Can you guess what percentage of the lines in OpenClaw were contributed by Pete?

https://www.reddit.com/r/PrincipalAi/s/fzWPLHanBs
1•fernando-ram•38m ago•1 comments

Brown says AI make student brain no work good, teacher should help use it better

https://www.theregister.com/ai-and-ml/2026/07/09/brown-says-ai-make-class-dumb-teacher-must-help-...
1•Bender•38m ago•0 comments

Ingit – Git GUI that runs in the browsers

https://github.com/capaj/ingit
2•Capaj•39m ago•3 comments

Patch for Windows Defender 0-day could allow attackers to fill hard disk

https://arstechnica.com/security/2026/07/patch-for-windows-defender-0-day-could-allow-attackers-t...
1•Bender•39m ago•0 comments

Michigan's explosive outbreak of diarrheal parasite jumps to over 1,200 cases

https://arstechnica.com/health/2026/07/michigans-explosive-outbreak-of-diarrheal-parasite-jumps-t...
8•Bender•39m ago•0 comments

Qubits can be cloned at will if encrypted with a single-use key

https://arxiv.org/abs/2602.10695
2•lisper•40m ago•0 comments

The Version Number Is Not the Territory

https://thebuild.com/blog/the-version-number-is-not-the-territory/
2•Shorn•40m ago•1 comments

The OpenClaw Foundation: Reining in a Viral AI Agent

https://techstrong.ai/articles/the-openclaw-foundation-reining-in-a-viral-ai-agent/
1•CrankyBear•40m ago•0 comments

Collapse of AMOC ocean current may be locked in

https://www.newscientist.com/article/2533017-collapse-of-amoc-ocean-current-may-already-be-locked...
3•Anon84•41m ago•0 comments

No Boss, No Money: The Raw Reality of China's Gen-Z Freelancers [video]

https://www.youtube.com/watch?v=eJZFUEQebbI
1•binyu•42m ago•0 comments

The OpenClaw Foundation

https://openclaw.ai/blog/introducing-openclaw-foundation
2•hrudolph•48m ago•0 comments

OpenAI's No. 2 Executive to Step Down in Latest Leadership Shake-Up

https://www.wsj.com/tech/openai-top-executive-fidji-simo-to-step-down-c3daca47
3•impish9208•51m ago•1 comments

28-Hour Day App

https://apps.apple.com/us/app/28-hour-day/id6752815000
3•28HourDev•53m ago•1 comments