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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/

Am-I.exposed – Bitcoin Privacy Scanner

https://am-i.exposed/
1•eustoria•30s ago•0 comments

Clausona: Claude Code profile manager now auto-syncs plugins across accounts

https://github.com/larcane97/clausona
1•larcane•4m ago•0 comments

Seam Carving with Forward Energy

https://pictolab.io/seam-carving
1•ChadNauseam•5m ago•1 comments

Why the Iran War Will Not End? (Part 1/5)

https://open.spotify.com/episode/1PGqOD9KnJG9wlwa348NDP
1•shreshthdugar•7m ago•0 comments

Needful Windows Update

https://web.archive.org/web/20260320192752/https://blogs.windows.com/windows-insider/2026/03/20/o...
1•CppPro•8m ago•1 comments

Cline: Autonomous coding agent right in your IDE

https://github.com/cline/cline
1•pretext•9m ago•0 comments

Every open source PM2 dashboard is abandoned. So I built one

https://www.indiehackers.com/post/pm2-has-no-web-ui-every-open-source-alternative-is-dead-so-i-bu...
1•theorchid•13m ago•0 comments

Report and receive real-time ICE sighting alerts online in your neighborhood

https://antifreeze.app/
3•cf100clunk•13m ago•1 comments

Parents are refusing routine preventive care for newborns

https://apnews.com/article/babies-newborns-pediatricians-vitamin-k-hepatitis-b-erythromycin-91264...
4•geox•13m ago•0 comments

Fire experts 'kept awake' over growing hazard of lithium-ion batteries

https://www.theguardian.com/technology/2026/mar/20/fire-experts-losing-sleep-over-growing-hazard-...
3•Brajeshwar•14m ago•0 comments

Strategy in the New Missile Age

https://www.tandfonline.com/doi/full/10.1080/09636412.2025.2604503#abstract
1•paulpauper•17m ago•0 comments

David Botstein, Gene-Mapping Pioneer, Dies at 83

https://www.nytimes.com/2026/03/20/science/david-botstein-dead.html
1•paulpauper•17m ago•0 comments

An Opera About Economics

https://www.bloomberg.com/news/articles/2026-03-20/gustavo-dudamel-s-the-wealth-of-nations-melds-...
1•paulpauper•18m ago•0 comments

German Star Christian Ulmen Accused of Revenge Porn Against Ex-Wife

https://www.hollywoodreporter.com/movies/movie-news/christian-ulmen-accused-of-revenge-porn-again...
1•doener•19m ago•0 comments

KDB-X

https://kx.com/products/kdb-x/
1•tosh•21m ago•0 comments

We Replaced Every Tool Claude Code Ships With

2•neilbb•25m ago•0 comments

Show HN: Batear – I built a $15 edge-only acoustic drone warning system

https://github.com/TN666/batear
4•t841222•25m ago•1 comments

CMU 15-411/611 Compiler Design

https://www.cs.cmu.edu/afs/cs/academic/class/15411-f20/www/
3•tosh•26m ago•0 comments

Getting my Apple Watch workout history into Garmin

https://brtkwr.com/posts/2026-03-21-converting-apple-health-workouts-to-garmin/
1•brtkwr•26m ago•1 comments

AntiX-26 released with 5 init systems

https://antixlinux.com/antix-26-released/
2•jandeboevrie•28m ago•0 comments

Paul Brainerd Dies at 78; Pioneered Desktop Publishing with PageMaker

https://www.nytimes.com/2026/03/21/technology/personaltech/paul-brainerd-dead.html
1•donohoe•30m ago•1 comments

Perimortem C-Section

https://en.wikipedia.org/wiki/Resuscitative_hysterotomy
1•davikr•31m ago•0 comments

Anand Shimpi Explains New Core Design in M5 Pro and M5 Max Chips

https://www.macobserver.com/news/apple-explains-new-core-design-in-m5-pro-and-m5-max-chips/
2•ksec•31m ago•1 comments

Jamie Dimon: AI 'will eliminate jobs,' but people with skills get opportunities

https://www.cnbc.com/2025/12/11/jamie-dimon-ai-will-eliminate-jobs-but-these-skills-will-get-you-...
3•cebert•32m ago•0 comments

Food, energy, and finance as the core control systems of geopolitics

https://creativedestruction.substack.com/p/the-most-effective-wmd-isnt-nuclear
1•jcarterwil•34m ago•0 comments

Show HN: Orchestrator, tmux-style split pane Claude sessions

https://github.com/MatchaOnMuffins/orchestrator
4•matchaonmuffins•35m ago•7 comments

iPhone spyware is everyone's problem now

https://www.axios.com/2026/03/21/iphone-spyware-is-everyones-problem-now
5•1vuio0pswjnm7•37m ago•0 comments

The GraphQL Goldmine: How to Reverse Engineer APIs for Scraping

https://norvilis.com/the-graphql-goldmine-how-to-reverse-engineer-apis-for-scraping/
2•zilton•42m ago•0 comments

A2i – A simple feed to keep up with AI drops

https://www.a2i.now/
3•markke•42m ago•0 comments

OpenAI is throwing everything into building an automated researcher

https://www.technologyreview.com/2026/03/20/1134438/openai-is-throwing-everything-into-building-a...
2•Brajeshwar•43m ago•1 comments