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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/

Famous 'Pink Planet' harbors a salty surprise

https://news.northwestern.edu/stories/2026/06/famous-pink-planet-harbors-a-salty-surprise
1•gmays•15s ago•0 comments

The Price of Lighting in the UK Has Dropped over 99.9% Since 1700

https://ourworldindata.org/data-insights/the-price-of-lighting-has-dropped-over-999-since-1700
1•karakoram•2m ago•0 comments

Why Incogni Might Be YouTube's Worst Sponsor [video]

https://www.youtube.com/watch?v=JFI1CfnDJxY
1•Udo_Schmitz•3m ago•0 comments

Show HN: PitchStage – an Omegle-style 1:1 pitch room for founders

https://live.tesor.app
1•torsianWorld•3m ago•0 comments

Windows 11 New Media Player Uses 3.5x More RAM, Charges for Popular Video Codecs

https://www.extremetech.com/computing/windows-11s-new-media-player-uses-35x-more-ram-charges-for-...
1•tcp_handshaker•4m ago•0 comments

Shutting Down Fornjot

https://fornjot.app/blog/shutting-down-fornjot/
1•birdculture•7m ago•0 comments

The terrifying world of the 'TikTok Farlands'

https://www.bbc.com/future/article/20260618-the-terrifying-world-of-the-tiktok-farlands
1•baranul•8m ago•0 comments

Neuralyzer - allow agent to self-wipe context for easier Ralph loop engineering

https://github.com/gintasz/neuralyzer
1•gintasz•8m ago•0 comments

Parse, Don't Validate – In a Language That Doesn't Want You To

https://cekrem.github.io/posts/parse-dont-validate-typescript/
1•thunderbong•11m ago•0 comments

I evaluated GLM 5.2 against the frontier on tasks from real repos

https://www.stet.sh/blog/glm-5-2-passes-tests-fails-review
1•bisonbear•11m ago•1 comments

A Humble 3-Wheel Electric Vehicle Lands Toyota in Federal Court

https://www.nytimes.com/2026/06/20/business/toyota-africa-electric-vehicles-lawsuit.html
1•ilamont•11m ago•0 comments

HashQL

https://hash.dev/blog/hashql-research-preview
2•tosh•14m ago•0 comments

The many multimillion-dollar homes of a professional ratbag

https://www.smh.com.au/national/nsw/the-many-multimillion-dollar-homes-of-a-professional-ratbag-2...
2•Alien1Being•18m ago•0 comments

Big Tech is borrowing like never before

https://startupfortune.com/big-tech-is-borrowing-like-never-before-and-the-fed-just-made-that-a-l...
1•krupan•23m ago•0 comments

Show HN: We post-trained a model that pen tests instead of refusing

https://www.argusred.com/cli
1•dk189•23m ago•0 comments

Show HN: Voice typing on Android with accurate punctuation and code-switching

https://replyvoice.com
2•kedimuzafer•23m ago•3 comments

Show HN: Fosbury – Put ads on autopilot across channels just by dropping a URL

https://www.fosbury.ai/
1•YarivAshkenazy•24m ago•0 comments

hgres

https://hgres.org
1•tosh•27m ago•0 comments

Show HN: Macro-template, table-driven code generation for Rust

https://github.com/fast/macro-template
1•tison•27m ago•0 comments

From PGP to Mythos: a brief history of export controls that didn't stop anyone

https://techcrunch.com/2026/06/19/encryption-spyware-and-now-mythos-history-shows-why-cyber-expor...
13•Brajeshwar•28m ago•3 comments

Enable software developers to compile hotspots into custom hardware accelerators

https://boolsi.com/seed-announcement.html
2•eatonphil•28m ago•0 comments

Privacy-Preserving Process Mining

https://hash.ai/blog/privacy-preserving-process-mining
1•tosh•28m ago•0 comments

The Eternal Allure of the Rabbit Hole

https://www.theatlantic.com/technology/2026/06/jfk-assassination-epstein-ufo-conspiracy-theories/...
1•fortran77•29m ago•0 comments

Bun 1.4: The Controversial AI-Driven Rewrite from Zig to Rust

https://grigio.org/bun-1-4-the-controversial-ai-driven-rewrite-from-zig-to-rust/
1•baranul•31m ago•0 comments

Nvidia-ZPPO: Zone of Proximal Policy Optimization

https://byungkwanlee.github.io/ZPPO-page/
1•gmays•33m ago•0 comments

Kremlometr - Using NLP to spot pro-Russian propaganda in czech media comments

https://kremlometr.cz/?lang=en
1•kekqqq•35m ago•0 comments

Show HN: I made AI bets for all World Cup games – bet against or with them

https://www.getaiso.com/tools/world-cup-ai-challenge
2•bentannen•38m ago•0 comments

Show HN: Material Hack – Reboot of the Hacker News Client Materialistic

https://github.com/mxmilkiib/material-hack
1•mxmilkiib•38m ago•1 comments

Canyon HUD helmet for road riding

https://media-centre.canyon.com/en-INT/266866-new-canyon-heads-up-display-helmet-could-be-a-safet...
1•zh3•39m ago•0 comments

US-Iran memorandum of understanding in full

https://www.bbc.com/news/articles/c4gy700j0eko
4•thisislife2•39m ago•4 comments