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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/

(writing exercise) Amateur Arithmetic

https://catileptic.tech/posts/writing-exercise-amateur-arithmetic/
1•volemo•1m ago•0 comments

OpenData Buffer: HA pipelines without Kafka

https://www.opendata.dev/blog/buffer-ha-pipelines-without-kafka/
1•apurvamehta•2m ago•0 comments

You're probably taking the wrong painkiller: acetaminophen vs. ibuprofen

https://dynomight.substack.com/p/painkillers
1•crescit_eundo•2m ago•0 comments

You shouldn't always antioxidants, especially if you want to build muscle

https://examine.com/faq/why-you-shouldnt-be-always-taking-antioxidants-especially-if-you-want-to-...
1•bilsbie•3m ago•0 comments

Show HN: Mdview.io – online Markdown viewer for software developer

https://mdview.io/s/3d460461
1•Igor_Wiwi•4m ago•0 comments

Elon Musk says his xAI startup's models were partially trained on OpenAI's tech

https://www.sfchronicle.com/tech/article/elon-musk-openai-trial-xai-22234502.php
2•grassfedgeek•5m ago•1 comments

Recovering files from beyond the grave using PhotoRec

https://lost-number.bearblog.dev/recovering-files-from-beyond-the-grave-using-photorec/
1•speckx•5m ago•0 comments

KKR Preparing New AI Firm Worth $10B Led by Ex-Amazon Web Chief

https://www.bloomberg.com/news/articles/2026-04-30/kkr-preparing-new-10-billion-ai-firm-led-by-ex...
1•htrp•5m ago•0 comments

All these smart glasses and nothing to do

https://www.theverge.com/tech/921159/smart-glasses-review-wearable-even-realities-g2-meta-ray-ban...
1•ZeidJ•6m ago•0 comments

Copy Fail CVE-2026-31431: 732 Bytes to Root on All Linux

https://byteiota.com/copy-fail-cve-2026-31431-732-bytes-to-root-on-all-linux/
1•wscott•7m ago•0 comments

China Is America's Equal Now and in Any Future Fight, Marine General Warns

https://www.twz.com/sea/china-is-americas-military-equal-now-and-in-any-future-fight-marine-gener...
3•Teever•8m ago•0 comments

Genome editing can be risky. Meet the epigenome editors

https://www.economist.com/science-and-technology/2026/04/29/genome-editing-can-be-risky-meet-the-...
1•Brajeshwar•10m ago•0 comments

Making The Smallest Possible Linux Distro (x64) (2025) [video]

https://www.youtube.com/watch?v=u2Juz5sQyYQ
1•peter_d_sherman•11m ago•0 comments

Auto Exacto: Adaptive Quality Routing, on by Default

https://openrouter.ai/announcements/auto-exacto
1•pr337h4m•11m ago•0 comments

We need RSS for sharing abundant vibe-coded apps

https://interconnected.org/home/2026/04/29/syndicating-vibes
1•mvdwoord•12m ago•0 comments

Building a tiny Linux from scratch (2025)

https://blinry.org/tiny-linux/
2•peter_d_sherman•13m ago•0 comments

Software is dead, long live Software

https://www.ashpreetbedi.com/articles/dynamic-software
2•ashpreet-bedi•14m ago•0 comments

Spell-Checking with LLMs

https://revise.io/blog/04-30-2026/spell-checking-with-llms
2•artursapek•15m ago•1 comments

Banksy confirms he's behind statue in central London

https://www.bbc.co.uk/news/articles/c5y9wlnwl85o
3•mellosouls•17m ago•0 comments

Meta Reports First Quarter 2026 Results

https://investor.atmeta.com/investor-news/press-release-details/2026/Meta-Reports-First-Quarter-2...
5•newusertoday•18m ago•0 comments

₹2 Lakh Personal Loan – Apply Online Easily – SMFG India Credit

https://www.smfgindiacredit.com/2-lakh-personal-loan.aspx
1•saumyaraut11•20m ago•0 comments

Samsung warns memory shortage to deepen next year as 2027 orders come in

https://asia.nikkei.com/business/tech/semiconductors/samsung-warns-memory-shortage-to-deepen-next...
2•newusertoday•21m ago•0 comments

The Block Model Behind Warp's Agentic Development Environment

https://www.warp.dev/blog/block-model-behind-warps-agentic-development-environment
3•mellosouls•23m ago•0 comments

Show HN: Coding-Flashcards – Learn Rust, SQLite, or Godot from First Principles

https://github.com/ad-si/Coding-Flashcards
3•adius•24m ago•0 comments

Radio Lockdown Averted

https://fsfe.org/activities/radiodirective/radiodirective.html
4•M95D•25m ago•0 comments

FreeMediaHeckYeah 8-Year Anniversary

https://fmhy.net/posts/anniversary
1•Cider9986•26m ago•0 comments

US track star Abby Steiner sues Puma alleging 'defective' shoes destroyed career

https://nypost.com/2026/04/29/sports/sprinter-abby-steiner-sues-puma-alleging-defective-shoes-des...
1•Tomte•26m ago•0 comments

Migrant Deaths Hit Record High Under Trump 2.0

https://www.techdirt.com/2026/04/30/migrant-deaths-hit-record-high-under-trump-2-0/
4•speckx•26m ago•0 comments

Vulnerability Lets Privilege Escalation to Root on Major Linux Distros Est. 2017

https://www.bleepingcomputer.com/news/security/new-linux-copy-fail-flaw-gives-hackers-root-on-maj...
2•ZeidJ•26m ago•0 comments

Could Eating Your Fruits and Veggies Give You Lung Cancer?

https://www.healthline.com/health-news/pesticides-healthy-foods-lung-cancer-risk-people-under-50
1•paulpauper•30m ago•0 comments