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Bloom's two sigma problem (2020)

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

Comments

trane_project•8mo 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/

Watch Mortal Kombat creators invent Scorpion's Kunai Spear in real time [video]

https://www.youtube.com/watch?v=fzWsWqPluus
1•nvader•3m ago•0 comments

Collections: The Late Bronze Age Collapse, a Brief Introduction

https://acoup.blog/2026/01/30/collections-the-late-bronze-age-collapse-a-very-brief-introduction/
2•Tomte•6m ago•0 comments

Show HN: I made tool to convert photo from day to dusk

https://www.aivirtualstaging.net/day-to-dusk
1•atharvtathe•9m ago•0 comments

Sunspots (Economic)

https://en.wikipedia.org/wiki/Sunspots_(economics)
2•downboots•9m ago•0 comments

TikTok keyword search through billions of comments, video transcripts, users

https://tt-tools.lolarchiver.com/keyword_search
2•Xafnor•10m ago•1 comments

News Tower

https://store.steampowered.com/app/1649950/News_Tower/
2•doener•12m ago•0 comments

Ask HN: Are posting my ideas/prototypes allowed here?

https://x.com/radcraftor
2•radcraftor_•13m ago•1 comments

Show HN: EditorWatch – Detect AI cheating by analyzing how students write code

https://github.com/Vic-Nas/EditorWatch
2•vicnas•13m ago•0 comments

Show HN: BmuS is a powerful free backup program for Linux, Mac and Windows

https://github.com/back-me-up-scotty/bmus
2•bmus•16m ago•0 comments

OpenAI Codex 0.93 adds SQLite backed log database

https://github.com/openai/codex/releases/tag/rust-v0.93.0
2•tosh•22m ago•0 comments

School Is Worse for Children Than Social Media

https://unpublishablepapers.substack.com/p/school-is-way-worse-for-kids-than
3•barry-cotter•23m ago•0 comments

Bob Iger to Step Down as Disney CEO Before End of 2026

https://variety.com/2026/biz/news/bob-iger-step-down-disney-ceo-before-end-of-2026-1236646611/
2•coolandsmartrr•25m ago•0 comments

'Reverse Solar Panel' Generates Electricity at Night

https://www.extremetech.com/science/reverse-solar-panel-generates-electricity-at-night
3•defrost•28m ago•0 comments

Layoffs are piling up, heightening worker anxiety

https://apnews.com/article/amazon-ups-layoffs-economy-washington-71bfde72b358fddb9a22c15aa13fe848
2•rustoo•29m ago•0 comments

YouTube blocks background video playback on Brave and other Browsers

https://piunikaweb.com/2026/01/28/youtube-background-play-samsung-internet-brave/
4•croes•32m ago•0 comments

Show HN: Oyster Bot – AI assistant for your phone, powered by Claude Code

https://github.com/TimFinnigan/oyster-bot
1•timfinnigan•35m ago•0 comments

Using project genie feels kinda like a game

https://project-genie.net/
2•ri-vai•36m ago•1 comments

The End of Transformers (2025)

https://arxiv.org/abs/2510.05364
1•teleforce•38m ago•0 comments

AI isn't making you faster. It's making you forgetful

https://jpcaparas.medium.com/ai-isnt-making-you-faster-it-s-making-you-forgetful-2d1ce729e321
2•zenoware•46m ago•1 comments

Eneloop

https://en.wikipedia.org/wiki/Eneloop
1•tosh•49m ago•0 comments

All 13 Episodes of Kenneth Clark's Civilisation: A Personal View

https://antigonejournal.com/2023/02/kenneth-clark-civilisation/
2•pajop•49m ago•0 comments

Show HN: AI knowledge base that auto-updates from your codebase

https://bunnydesk.ai
2•mkapoor26•50m ago•0 comments

The Lesser Evil of Compliance: Enterprise SBoM Strategy for CRA Readiness

https://nesbitt.io/2026/01/20/the-lesser-evil-of-compliance.html
1•lifeisstillgood•51m ago•0 comments

China edges up with 3 of top chipmaking gear suppliers

https://asia.nikkei.com/business/tech/semiconductors/china-edges-up-with-3-of-world-s-top-20-chip...
2•SanjayMehta•51m ago•1 comments

Forget Postman and JMeter: Test APIs with natural language prompts

https://github.com/onurkanbakirci/prompmeter
1•onurkanbkrc•52m ago•0 comments

An explorable agent architecture with persistent internal state&self-observation

https://github.com/sivanhavkin/Entelgia
2•sivanhavkin•52m ago•1 comments

Sumerian Star Map Recorded the Impact of an Asteroid (2024)

https://archaeologyworlds.com/5500-year-old-sumerian-star-map-recorded/
3•griffzhowl•54m ago•0 comments

Lackluster superintelligence and the infinite data plane

https://fowler.dev/posts/2026-01-30/
1•Descon•54m ago•0 comments

Show HN: Interactive Equation Solver

2•dharmatech•55m ago•0 comments

Epstein files: Musk planned to visit sex offender's island, host him at SpaceX

https://www.cnbc.com/2026/01/30/epstein-files-show-elon-musk-planned-visit-to-island-host-at-spac...
11•SilverElfin•56m ago•2 comments