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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•10mo ago

Comments

trane_project•10mo 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/

Will This 'Miracle' Battery Change Your Mind About EVs?

https://www.wsj.com/lifestyle/cars/donut-lab-solid-state-battery-ssb-ev-4e6ad966
1•NN88•1m ago•1 comments

Solving the Strait of Hormuz Blockage

https://www.austinvernon.site/blog/thestrait.html
1•paulpauper•1m ago•0 comments

Airfare Is Just the Beginning

https://www.theatlantic.com/newsletters/2026/03/expensive-plane-tickets-oil-iran/686604/
1•paulpauper•2m ago•0 comments

Stop picking my Go version for me

https://blog.howardjohn.info/posts/go-mod-version/
1•ingve•2m ago•0 comments

Show HN: EnterpriseFizzBuzz – 622K lines of production-grade FizzBuzz

https://github.com/Elijah-J/EnterpriseFizzBuzz
1•CodeIsMyFetish•6m ago•0 comments

AI Perfected Chess. Humans Made It Unpredictable Again

https://www.bloomberg.com/news/articles/2026-03-27/ai-changed-chess-grandmasters-now-win-with-unp...
1•GMoromisato•11m ago•1 comments

Show HN: Windows 95–style Weather App for iPhone

https://apps.apple.com/us/app/weather-exe/id6761195944
1•web3rb•11m ago•0 comments

Intel Core Ultra Series 3 VPro: 18A AI PCs Debut with Dtect Security Updates

https://hothardware.com/news/intel-unveils-core-ultra-series-3-vpro
1•rbanffy•17m ago•0 comments

Goldman Sachs now reckons that oil could take out the 2008 record of $147

https://www.ft.com/content/360ca227-4d2a-41a4-a05f-41baedc0f7d2
2•bookofjoe•17m ago•1 comments

Causality optional? Testing the "indefinite causal order" superposition

https://arstechnica.com/science/2026/03/getting-formal-about-quantum-mechanics-lack-of-causality/
1•rbanffy•17m ago•0 comments

Show HN: Drag-to-Reveal Before/After Slider Component for React/Next.js

1•doanything_ai•18m ago•1 comments

Russia took satellite images of U.S. base before Iranian attack, Zelensky says

https://www.nbcnews.com/world/ukraine/russia-us-base-american-troops-zelenskyy-rcna265612
1•vrganj•19m ago•0 comments

Suspect in Foiled Bank of America Attack Says He Was Recruited on Snapchat

https://www.newsweek.com/suspect-in-foiled-bank-of-america-attack-says-he-was-recruited-on-snapch...
1•geox•21m ago•0 comments

I built PistonAlpha to track the collector car market in real time

https://pistonalpha.com/
1•magrix•22m ago•0 comments

The Cryptopals Crypto Challenges

https://cryptopals.com/
1•pmaddams•22m ago•0 comments

The Braille Institute's family of hyperlegible fonts

https://www.brailleinstitute.org/freefont/
1•pmaddams•23m ago•0 comments

Benchmarking quantum simulation with neutron-scattering experiments

https://arxiv.org/abs/2603.15608
1•rbanffy•23m ago•0 comments

MCP Toolbox for Databases

https://github.com/googleapis/genai-toolbox
1•pmaddams•24m ago•0 comments

Old masters, new perspectives: The Gemäldegalerie in Berlin

https://blog.google/company-news/outreach-and-initiatives/arts-culture/old-masters-new-perspectiv...
1•gnabgib•24m ago•0 comments

Claude-IPC: Watch 5 claudes build a terminal Yubikey manager together [video]

https://www.youtube.com/watch?v=6vEJNr8sASI
1•thejabberwock•26m ago•1 comments

Is AI agent discoverability a reputation graph problem, not an SEO problem?

https://www.snackonai.com/p/the-web-of-trust-will-be-the-next-distribution-layer
1•mohinish•33m ago•0 comments

Private equity turned vulnerable elderly people into human ATMs

https://www.theguardian.com/society/2026/mar/28/the-great-care-home-cash-grab-how-private-equity-...
21•mordechai9000•35m ago•4 comments

OpenClaw is fun. OpenClaw is dangerous. Here's where Tailscale helps

https://tailscale.com/blog/openclaw-tailscale-aperture-serve
1•makaimc•35m ago•0 comments

U.S. uses hundreds of Tomahawk missiles on Iran, alarming some at Pentagon

https://www.washingtonpost.com/national-security/2026/03/27/iran-war-tomahawk-missiles/
3•breve•36m ago•0 comments

Left Atrial Appendage Closure or Anticoagulation for Atrial Fibrillation

https://www.nejm.org/doi/full/10.1056/NEJMoa2517213
1•bookofjoe•37m ago•0 comments

Verify_before – pre-deployment verifiability analysis for neuro-symbolic AI

https://elliotfairbanksjunior.substack.com/p/i-predicted-a-number
1•MaybeGoodRoyal•44m ago•0 comments

Building an E2E Encrypted Chat Application with LanceDB and Libsodium

https://www.justinrmiller.com/building-an-e2e-encrypted-chat-application-with-lancedb-and-libsodium/
2•securicat•45m ago•0 comments

Drones Market Research Report 2026-2036

https://finance.yahoo.com/news/drones-market-research-report-2026-144300424.html
1•mooreds•50m ago•0 comments

Show HN: Glazyr Viz – Zero-Copy MCP Vision Server via POSIX Shared Memory

https://github.com/senti-001/glazyr-viz
1•mcpmessenger•51m ago•0 comments

Effective Debugging

https://simplerengineeringmanagement.substack.com/p/effective-debugging
1•mooreds•52m ago•0 comments