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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•7mo ago

Comments

trane_project•7mo 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/

Tech Startups Are Handing Out Free Nicotine Pouches to Boost Productivity

https://www.wsj.com/tech/tech-startups-are-handing-out-free-nicotine-pouches-to-boost-productivit...
1•croes•22s ago•0 comments

Show HN: Shipping Without Judgment

https://dantelex.com/blog/shipping-judgement
1•lexokoh•4m ago•0 comments

ADF Opus: open, browse, and manage Amiga .ADF disk-images natively

https://github.com/chironb/ADFOpus2025
1•doener•6m ago•0 comments

Minimig RTG Magic [video]

https://www.youtube.com/watch?v=DBO9sD6EYS4
1•doener•9m ago•0 comments

GNU Ddrescue 1.30 Orders of Magnitude Better Working on Drives with a Dead Head

https://www.phoronix.com/news/GNU-ddrescue-1.30
2•Qem•10m ago•0 comments

Riot Games's League of Legends login issues due to expired SSL certificate

https://old.reddit.com/r/leagueoflegends/comments/1q40aen/comment/nxpij3c/
2•dossy•13m ago•1 comments

Voting for Mayor Who Promised to Blow Up City Doesn't Mean I Approve of It

https://www.mcsweeneys.net/articles/voting-for-the-mayor-who-promised-to-blow-up-the-city-doesnt-...
3•Geekette•15m ago•0 comments

How the sugar industry bought out scientists for decades

https://www.extremetech.com/extreme/235472-how-the-sugar-industry-bought-out-scientists-for-decad...
1•aldarion•18m ago•0 comments

Show HN: Airgapped Android Setup with a Makefile

https://blog.thisago.com/announcement/20260104-phoneSetup1.html
1•thisago•22m ago•0 comments

NeXTSTEP on Pa-RISC

https://www.openpa.net/nextstep_pa-risc.html
1•andsoitis•22m ago•0 comments

Alexa+ at Your Fingertips

https://alexa.amazon.com/about
1•qainsights•25m ago•1 comments

2026: The year of Not-invented-here syndrome

https://system32.ai/blogs/nih-on-steroids
2•bitlad•28m ago•0 comments

Warren Buffett emails Microsoft exec

https://www.techemails.com/p/warren-buffett-emails-microsoft-exec-jeff-raikes
3•cinaboniver•33m ago•1 comments

Show HN: Turn meetings into summaries, presentations, and an AI to ask questions

https://notefy.pro/
1•jimmydin7•35m ago•0 comments

Ask HN: What AI systems have you adopted across your work and personal life?

1•alexjray•39m ago•1 comments

Chromosome region linked to neurodev disorders influences locomotor behavior

https://www.nature.com/articles/s41467-025-68047-y
3•bookofjoe•46m ago•1 comments

Wallpaper Symmetry

https://math.hws.edu/eck/js/symmetry/wallpaper.html
4•xnx•58m ago•0 comments

The most impressive 15min tech demo you've never seen [video]

https://www.youtube.com/watch?v=72y2EC5fkcE
1•thundergolfer•59m ago•4 comments

"HP-UX hits end-of-life today, and I'm sad"

https://www.osnews.com/story/144094/hp-ux-hits-end-of-life-today-and-im-sad/
6•SanjayMehta•1h ago•1 comments

The Napoleon Technique: Postponing Things to Increase Productivity

https://effectiviology.com/napoleon/
2•Khaine•1h ago•0 comments

Waymo wants to be Big Tech's nice guy. Will San Francisco buy it?

https://www.sfchronicle.com/sf/article/waymo-car-san-francisco-21270363.php
1•mikhael•1h ago•0 comments

Show HN: OBTF-2, simple notes with screenshots

https://vgkids.github.io/obtf-2/
1•james_marks•1h ago•0 comments

'Moral injury' officially recognized as mental health condition

https://hsph.harvard.edu/news/moral-injury-officially-recognized-as-mental-health-condition/
2•rendx•1h ago•0 comments

Show HN: HackTheNews.app v2 – Hacker News notifications, AI, reading lists, etc.

https://hackthenews.app/
1•hackthenewsapp•1h ago•0 comments

Show HN: A drag and drop email HTML builder that outputs email safe markup

https://emailbuilder.cc/
1•RichHickson•1h ago•0 comments

Using Claude Code to Solve Advent of Code 2025

https://dineshgdk.substack.com/p/using-claude-code-to-solve-advent
1•dinesh_gdk•1h ago•0 comments

Ask HN: What's the oldest piece of code still running in your stack?

4•rafaepta•1h ago•2 comments

DOM Event Explorer/Sandbox

https://domevents.dev/
1•dalemyers•1h ago•0 comments

Vulkangruppe

https://en.wikipedia.org/wiki/Vulkangruppe
2•doener•1h ago•0 comments

Larry Tesler Obituary (2020)

https://www.theguardian.com/technology/2020/feb/28/larry-tesler-obituary
3•rafaepta•1h ago•1 comments