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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•6mo ago

Comments

trane_project•6mo 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/

How I Streamlined My Development Workflow – A Game Changer for Productivity

1•quchao•10m ago•1 comments

When Money Buys Thinking: A New Day in the Life of Developers

https://tamnd.notion.site/2c74b9c1b50d8049b160f073cf773187
1•tamnd•11m ago•0 comments

Show HN: Record iOS Screen with Gestures Included

https://demoscope.app/#ios
1•admtal•17m ago•0 comments

Show HN: MiddleDrag: Three-finger trackpad gestures for middle-click on macOS

https://github.com/NullPointerDepressiveDisorder/MiddleDrag
1•NullPointerDD•18m ago•1 comments

America's Debanking Witch Hunt Finds No Evil

https://www.bloomberg.com/opinion/articles/2025-12-11/debanking-witch-hunt-finds-no-evildoing-in-...
1•petethomas•23m ago•0 comments

Show HN: I got my site down to 237kb by ditching Google Analytics

https://deadstack.net/
1•dreadsword•23m ago•0 comments

Malware found in the subtitles of a fake Leonardo DiCaprio movie torrent

https://www.bitdefender.com/en-us/blog/labs/fake-leonardo-dicaprio-movie-torrent-agent-tesla-powe...
2•CGMthrowaway•24m ago•1 comments

Monumental snake engravings of the Orinoco River (2024)

https://www.cambridge.org/core/journals/antiquity/article/monumental-snake-engravings-of-the-orin...
1•bryanrasmussen•24m ago•0 comments

Rethinking armed group control (2022)

https://odi.org/en/publications/rethinking-armed-group-control/
1•bryanrasmussen•26m ago•0 comments

Modos open source e-paper monitor development update

https://www.crowdsupply.com/modos-tech/modos-paper-monitor/updates/highlights-certifications-and-...
2•Curiositry•29m ago•0 comments

Untreated sleep apnea raises risk of Parkinson's, study finds

https://medicalxpress.com/news/2025-11-untreated-apnea-parkinson.html
2•PaulHoule•30m ago•0 comments

Gemini model that would train on all gmail

1•orena•31m ago•0 comments

Show HN: Advent of Acro – A frameworkless PHP/JS video advent-calendar

https://advent.vs.digital/
1•schuhwerk•32m ago•0 comments

Google is building an experimental new browser and a new kind of web app

https://www.theverge.com/tech/842000/google-disco-browser-ai-experiment
2•cryptoz•33m ago•0 comments

Show HN: UJAS – An open-source hiring platform (like WordPress for hiring)

https://github.com/gemini45840-cmyk/UJAS
1•jayteetech•37m ago•0 comments

Mark V Shaney

https://en.wikipedia.org/wiki/Mark_V._Shaney
1•djoldman•41m ago•0 comments

Mercury Personal Banking

https://mercury.com/personal-banking
1•gregimba•48m ago•4 comments

Historic Flooding in Western Washington

https://www.kuow.org/stories/go-now-100-000-evacuated-in-historic-skagit-flood
1•measurablefunc•48m ago•0 comments

Mathgpt.today for Discord

https://mathgpt.today/
1•umeedsto•49m ago•1 comments

6.7 Magnitude Earthquake Strikes Off Northeast Japan

https://www.newsweek.com/6-7-magnitude-earthquake-strikes-off-northeast-japan-11199276
2•ls-a•51m ago•1 comments

Rescued at Sea: How Venezuela's Machado Survived the Riskiest Leg of Her Escape

https://www.wsj.com/world/americas/rescued-at-sea-how-venezuelas-machado-survived-the-riskiest-le...
1•petethomas•51m ago•1 comments

Jonathan Blow has spent the past decade designing 1,400 puzzles for you

https://arstechnica.com/gaming/2025/12/jonathan-blow-has-spent-the-past-decade-designing-1400-puz...
2•furcyd•54m ago•0 comments

Show HN: PowerKit for Tmux – 32 Plugins

https://github.com/fabioluciano/tmux-powerkit
1•fabioluciano•1h ago•0 comments

Forget flowers: These ancient plants attract pollinators by getting hot

https://www.npr.org/2025/12/11/nx-s1-5637486/ancient-heat-producing-plants-glow-infrared-scent-no...
2•andsoitis•1h ago•0 comments

Show HN: ProdE – code change impact and root cause analysis for large codebases

https://prode.ai/
1•curious_nile•1h ago•2 comments

DynamoDB: Resilience and lessons from the Oct 2025 service disruption [video]

https://www.youtube.com/watch?v=YZUNNzLDWb8
1•mooreds•1h ago•0 comments

Sentimental Versioning

https://github.com/dominictarr/sentimental-versioning
2•handfuloflight•1h ago•0 comments

When you don't create things (2020)

https://www.nilkanth.com/when-you-dont-create-things/
2•nreece•1h ago•0 comments

Show HN: Argly – Turn your iPhone into a remote for your Mac [over WiFi]

https://apps.apple.com/us/app/argly/id6755750961
1•tn_•1h ago•1 comments

Show HN: I want to democratise Bloomberg Terminal

https://www.aulico.com/workspaces/new
2•lalalerodas•1h ago•1 comments